siprotec 4 7sd52/53 multi-end differential and distance ..._control_and... · • differential...

Function overview

Description

Siemens SIP · 2008

7 Line Differential Protection / 7SD52/53

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Protection functions• Differential protection with phase-

segregated measurement (87L, 87T)• Restricted earth-fault protection (87N) if a

transformer is within the protection zone• Sensitive meas. stage f. high-resist. faults• Non-switched distance protection with

6 measuring systems (21/21N)• High resistance ground (earth)-fault

protection for single and three-poletripping (50N/51N/67N)

• Phase-selective intertripping (85)• Tele (pilot) protection (85/21, 85/67N)• Weak-infeed protection (27WI)• Fault locator (FL)• Power swing detection/tripping (68/68T)• 3-stage overcurrent protection

(50, 50N, 51, 51N)• STUB bus protection (50 STUB)• Switch-onto-fault protection (50HS)• Over/undervoltage protection (59/27)• Over/underfrequency protection (81O/U)• Auto-reclosure (79), Synchro-check (25)• Breaker failure protection (50BF)• Overload protection (49)• Lockout function (86)

Control functions• Commands f. ctrl of CB and isolators

Monitoring functions• Self-supervision of relay and protection

data (R2R) communication• Trip circuit supervision (74TC)• Measured-value supervision• Oscillographic fault recording• Event logging/fault logging• Switching statistics

Front design• User-friendly local operation• PC front port for relay setting• Function keys and 14 LEDs f. local alarm

Communication interfaces• 2 serial protection data (R2R) interfaces

for ring and chain topology• Front interface for connecting a PC• System interface for connection to a

control system via various protocols– IEC 61850 Ethernet– IEC 60870-5-103– PROFIBUS-FMS/-DP and DNP 3.0

• Rear-side service/modem interface• Time synchronization via IRIG-B or

DCF77 or system interface

SIPROTEC 4 7SD52/53Multi-End Differential and Distance Protection in One Relay

The 7SD52/53 relay provides full schemedifferential protection and incorporates allfunctions usually required for the protec-tion of power lines. It is designed for allpower and distribution levels and protectslines with two up to six line ends. The relayis designed to provide high-speed andphase-selective fault clearance. The relayuses fiber-optic cables or digital communi-cation networks to exchange telegrams andincludes special features for the use in mul-tiplexed communication networks. Alsopilot wires connections can be used withan external converter. This contributes to-ward improved reliability and availabilityof the electrical power system.

The relay is suitable for single andthree-phase tripping applications for twoup to six line ends. Also, transformers andcompensation coils within the differentialprotection zone are protected as are serialand parallel-compensated lines and cables.The relays may be employed with any typeof system earthing.The relay also provides a full-scheme andnon-switched distance protection as an op-tional main 2 protection. Several telepro-tection schemes ensure maximum selectiv-ity and high-speed tripping time.

The units measure the delay time in thecommunication networks and adaptivelymatch their measurements accordingly.

A special GPS-option allows the use of therelays in communication networks, wherethe delay time in the transmit and receivepath may be quite different.

The 7SD52/53 has the following features:

− 2 full-scheme main protections in oneunit (differential and distance protec-tion)

− High-speed tripping 10 - 15 ms

− The serial protection data interfaces(R2R interfaces) of the relays can flexiblybe adapted to the requirements of allcommunication media available.

− If the communication method ischanged, flexible retrofitting of commu-nication modules to the existing configu-ration is possible.

− Tolerates loss of one data connection in aring topology (routing in 120 ms). Thedifferential protection scheme is fullyavailable in a chain topology.

− Browser-based commissioning tool.

− Fault locator for one and two terminalmeasurement for high accuracy on longlines with high load and high fault resis-tance.

− Capacitive charge current compensationincreases the sensitivity of the differentialprotection on cables and long lines.

Fig. 7/41SIPROTEC 47SD52/53 differential protection relay

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Application

Fig. 7/42

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ANSI ANSI

87L Δ I for lines / cables 50HS Instantaneous high-currenttripping (switch-onto-fault)

87T Δ I for lines / cableswith transformers

59 27 Overvoltage/undervoltageprotection

87N Low impedance restrictedearth-fault protection fortransformers

81O/U Over/underfrequency protec-tion

85 Phase-selectiveintertrip, remote trip

25 Synchro-check

86 Lockout function 79 Single or three-poleauto-reclosure with newadaptive technology

21 21N Distance protection 49 Overload protection

FL Fault locator 50BF Breaker failure protection

68 68T Power swing detec-tion/tripping

74TC Trip circuit supervision

85/21 Teleprotection for distanceprotection

50-STUB STUB bus protection

27WI Weak-infeed protection

50N 51N

67N

Directional earth(ground)-fault protection

85/67N Teleprotection for earth(ground)-fault protection

50 50N

51 51N

Three-stage overcurrentprotection

*) Option

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Fig. 7/43 Application for three line ends (Ring topology)

Typical applications

SIPROTEC 7SD52/53 is a full-scheme dif-ferential protection relay for two up to sixline ends, incorporating all the additionalfunctions for protection of overhead linesand cables at all voltage levels. Also trans-formers and compensation coils withinthe protection zone are protected. The7SD52/53 is suitable for single-pole andthree-pole tripping. The power system starpoint can be solid or impedance-grounded(earthed), resonant-earthed via Petersoncoil or isolated. On the TAP-line, the7SD52/53 differential relay is connected tocurrent (CT) and optionally voltage (VT)transformers. For the differential func-tions, only CTs are necessary. By con-necting the relay to VTs, the integrated"main 2" distance protection can be ap-plied (full-scheme, nonswitched). There-fore, no separate distance protection relayis required.

The link to the other relays is made bymulti-mode or mono-mode FO cables.There are 5 options available, which corre-spondingly cover:

• 820 nm, up to 1.5 km, multi-mode

• 820 nm, up to 3.5 km, multi-mode

• 1300 nm, up to 24 km, mono-mode



Direct fiber-optic connection offers high-speed data exchange with 512 kbit/s andimproves the speed for remote signaling.

At the main line two differential relays areconnected to CTs. The communication ismade via a multiplexed communicationnetwork.

The 7SD52/53 offers many features toreliably and safely handle data exchangevia communication networks.

Depending on the bandwidth available inthe communication system, 64, 128 or512 kbits/s can be selected for the X21(RS422) interface; the G703 interface with64 kbit/s, and G703-E1 (2,048 kbit/s) orG703-T1 (1,554 kbit/s).

The connection to the communicationdevice is effected via cost-effective 820 nminterface with multi-mode FO cables.A communication converter converts theoptical to electrical signals. This offers aninterference-free and isolated connectionbetween the relay and the communicationdevice.

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Application

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Cost-effective power system management

The SIPROTEC 4 units are numerical re-lays which also provide control and moni-toring functions and therefore support theuser in view of a cost-effective power sys-tem management. The security and reli-ability of power supply is increased as aresult of minimizing the use of hardware.

The local operation has been designed ac-cording to ergonomic criteria. Large, easy-to-read backlit displays are provided.

The SIPROTEC 4 units have a uniformdesign and a degree of functionality whichrepresents a benchmark-level of perfor-mance in protection and control. If therequirements for protection, control orinterlocking change, it is possible in themajority of cases to implement suchchanges by means of parameterizationusing DIGSI 4 without having to changethe hardware.

The use of powerful microcontrollers andthe application of digital measured-valueconditioning and processing largely sup-presses the influence of higher-frequencytransients, harmonics and DC compo-nents.

Connection techniques and housing withmany advantages

1/3, 1/2, 2/3, and 1/1-rack sizes:These are the available housing widths ofthe 7SD52/53 relays, referred to a 19" mod-ule frame system. This means that previousmodels can always be replaced. The heightis a uniform 245 mm for flush-mountinghousings and 266 mm for surface-mount-ing housings for all housing widths. All ca-bles can be connected with or without ringlugs. Plug-in terminals are available as anoption. It is thus possible to employ pre-fabricated cable harnesses. In the case ofsurface mounting on a panel, the connec-tion terminals are located above and belowin the form of screw-type terminals. Thecommunication interfaces are located in asloped case at the top and bottom of thehousing.

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Construction

Fig. 7/44

Flush-mounting housingwith screw-type terminals

Fig. 7/45

Rear view of flush-mounting housing withcovered connection terminals and wirings

Fig. 7/46

Surface-mounting housing with screw-typeterminals

Fig. 7/47

Communication interfacesin a sloped case in a surface-mounting housing

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Differential protection (ANSI 87L, 87T, 87N)

The differential protection function has thefollowing features:

• It is possible to select the operating modeas "main" or as "main 1", if the back-updistance protection is activated as"main 2".

• Measurements are performed separatelyfor each phase; thus the trip sensitivity isindependent of the fault type.

• An adaptive, sensitive measurementmethod with high sensitivity for differen-tial fault currents below the rated currentoffers the detection of highly resistivefaults. This trip element uses special fil-ters, which offers high security even withhigh level DC-components in the short-circuit current. The trip time of this stageis about 30 ms.

• A high-set differential trip stage whichclears differential fault currents higherthan the rated current within 10 – 15 msoffers fast tripping time and high-speedfault clearence time.

• When a long line or cable is switched on,transient charge currents load the line.To avoid a higher setting of the sensitivedifferential trip stage, this setpoint maybe increased for a settable time. This of-fers greater sensitivity under normal loadconditions.

• With the setting of the CT-errors therelay automatically calculates the re-straint/stabilization current and adaptsits permissible sensitivity according tothe CT’s data in the differential configu-ration, optimizing sensitivity.

• Different CT ratios at the line ends arehandled inside the relay. The mismatchof 1 to 6 is allowed.

• The differential protection trip can beguarded with an overcurrent pickup.Thus differential current and overcur-rent lead to a final trip decision.

• Easy to set tripping characteristic.Because the relay works adaptively, onlythe setpoint IDiff > (sensitive stage) andIDiff >> (high-set current differentialstage) must be set according to thecharge current of the line/cable.

• With an optional capacitive charge cur-rent compensation, the sensitivity can beincreased to 40 % of the normal settingof IDIFF>. This function is recommendedfor long cables and long lines.

• Differential and restraint currents aremonitored continuously during normaloperation and are displayed as opera-tional measurements.

• High stability during external faults evenwith different current transformers satu-ration level. For an external fault, only5 ms saturation-free time are necessaryto guarantee the stability of the differen-tial configuration.

• With transformers or compensation coilsin the protection zone, the sensitive tripstage can be blocked by an inrush detec-tion function. It works with the secondharmonic of the measured current whichis compared with the fundamental com-ponent.

• With transformers in the protectionzone, vector group adaptation andmatching of different CT ratios arecarried out in the relay. Additionally, thezero-sequence current flowing throughan earthed neutral is eliminated from thedifferential measurement. The 7SD52/53therefore works like a transformer differ-ential relay, whereas the line ends may befar away.

• A more sensitive protection for trans-formers within the protection zone isgiven by measurement of the star-pointcurrent on an earthed winding. There-fore the IE current measuring input hasto be used.If the sum of the phase currents of wind-ing is compared with the measuredstar-point current, a sensitive earth-cur-rent differential protection (REF) can beimplemented.This function is substantially more sensi-tive than the differential protection dur-ing faults to earth in a winding, detectingfault currents as small as 10 % of thetransformer rated current.

Enhanced communication features forcommunication networks

The data required for the differentialcalculations are cyclically exchanged infull-duplex mode in form of synchronous,serial telegrams between the protectionunits. The telegrams are secured with CRCcheck sums, so that transmission errors ina communication network are immediatelydetected.

• Data communication is immune toelectromagnetic interference becausefiber-optic cables are employed in thecritical region

• Supervision of each individual incomingtelegram and of the entire communica-tion path between the units withoutadditional equipment.

• Unambiguous identification of each unitis ensured by assignment of a settablecommunication address within a differ-ential protection topology. Only thoseunits mutually known to each other cancooperate. Incorrect interconnection ofthe communication links results inblocking of the protection system.

• Detection of reflected telegrams in thecommunication system.

• Detection of delay time changes incommunication networks.

• Measurement of the delay time to theremote line ends with dynamic compen-sation of the delay in the differentialmeasurement. Supervision of the maxi-mum permissible delay time is included.

• Generation of alarms on heavily dis-turbed communication links. Faultytelegram counters are available asoperational measurement.

• With a GPS high-precision 1-s pulse froma GPS receiver the relays can be synchro-nized with an absolute, exact time at eachline end. In this way, the delay in the re-ceive and transmit path can be measuredexactly. With this optional feature the relaycan be used in communication networkswhere this delay times are quite different.

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Protection functions

Fig. 7/48 Tripping characteristic

Phase-selective intertrip and remotetrip/indications

Normally the differential fault current iscalculated for each line end nearly at thesame time. This leads to fast and uniformtripping times. Under weak infeed condi-tions, especially when the differential func-tion is combined with an overcurrentpickup a phase-selective intertrip offers atripping of all line ends.

• 7SD52/53 has 4 intertrip signals which aretransmitted in high-speed (< 20 ms) tothe other line ends. These intertrip signalscan also be initiated by an external relayvia binary inputs and therefore be used toindicate, for example, a directional deci-sion of the backup distance relay.

• In addition, 4 high-speed remote trip sig-nals are available, which may be initiatedby an external or internal event.

• 24 remote signals can be freely assignedto inputs and outputs at each line endand are circulating between the differentdevices.

Communication topologies / modes ofoperation

The differential relays may work in a ringor daisy chain line topology. Use of a testmode offer advantages under commission-ing and service conditions.

• The system tolerates the loss of one dataconnection in a ring topology. The ringtopology is rerouted within 20 ms form-ing then a chain topology, while the dif-ferential protection function isimmediately reactivated.

• When the communication connectionsneed to be reduced or when these are notavailable, the whole system is able tofunction without interruption as chaintopology. At the line ends, only cost-effective 7SD52/53 relays with one pro-tection data interface are necessary forthis application.

• The two-end line is a special case, be-cause when the main connection is inter-rupted, the communication switchesover from a main path to a secondarypath. This hot standby transmissionfunction ensures a high availability of thesystem and protects differential protec-tion against communication route failureon important lines.

• In a ring topology, one line end can belogged out from the differential protec-tion topology for service or maintenancereasons by a signal via binary input.Checks for the breaker position and loadcurrent are made before this logout is ini-tiated. In a chain topology, the relays atthe end of the line can be logged out fromthe differential protection topology.

• The whole configuration can be set upinto a test mode. All functions and indi-cations are available except the breakersare not tripped. The local relay can betested and no trip or intertrip reaction iseffected by the other relays.

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Fig. 7/49 Differential protection in ring or chain topology

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Distance protection (ANSI 21, 21N)

7SD52/53 provides a non-switched dis-tance protection featuring all well-provenalgogrithms of 7SA522 and 7SA6. It is pos-sible to select the operating mode "main"or "main 2", if the back-up differential isactivated as "main 1". By parallel calcula-tion and monitoring of all six impedanceloops, a high degree of sensitivity and se-lectivity is achieved for all types of faults.The shortest tripping time is less than onecycle. All methods of neutral-point con-nection (resonant earthing, isolated, solidor low-resistance earthing) are reliablydealt with. Single and three-pole tripping ispossible. Overhead lines can be equippedwith or without series capacitor compensa-tion.

Quadrilateral and mho characteristics

The 7SD52/53 relay provides quadrilateralas well as mho zone characteristics. Bothcharacteristics can be used separately forphase and ground (earth) faults. Resistanceground (earth) faults can, for instance, becovered with the quadrilateral characteris-tic and phase faults with the mho charac-teristic.

Alternatively, the quadrilateral characteris-tic is available with 4 different pickupmethods:

• Overcurrent pickup I>>

• Voltage-dependent overcurrent pickupV/I

• Voltage-dependent and phase angle-dependent overcurrent pickup V/I/ϕ

• Impedance pickup Z<

Load zone

In order to guarantee a reliable discrimi-nation between load operation and short-circuit – especially on long high loadedlines – the relay is equipped with a select-able load encroachment characteristic.Impedances within this load encroachmentcharacteristic prevent the distance zonesfrom unwanted tripping.

Absolute phase-selectivity

The distance protection incorporates awell-proven highly sophisticated phase se-lection algorithm. The pickup of unfaultedloops is reliably eliminated to prevent theadverse influence of currents and voltagesin the fault-free loops. This phase selectionalgorithm achieves single-pole tripping andcorrect distance measurement in a wideapplication range.

Fig. 7/50

Distance protection:quadrilateral characteristic

Fig. 7/51

Distance protection:mho characteristic

Parallel line compensation

The influence of wrong distance measure-ment due to parallel lines can be compen-sated by feeding the neutral current of theparallel line to the relay. Parallel line com-pensation can be used for distance protec-tion as well as for fault locating.

6 distance zones

Five independent distance zones and oneseparate overreach zone are available. Eachdistance zone has dedicated time stages,partly separate for single-phase or multi-phase faults. Ground (earth) faults are de-tected by monitoring the neutral current3I0 and the zero-sequence voltage 3V0.

The quadrilateral tripping characteristic per-mits separate setting of the reactance X andthe resistance R. The resistance section R can

be set separately for faults with and with-out earth involvement. This characteristichas therefore an optimal performance incase of faults with fault resistance. The dis-tance zones can be set forward, reverse ornon-directional. Sound phase polarizationand voltage memory provides a dynami-cally unlimited directional sensitivity.

Mho

The mho tripping characteristic providessound phase respectively memory polariza-tion for all distance zones. The example inthis figure shows the characteristic for aforward fault where the mho circle ex-pands to the source impedance but nevermore than the selected impedance reach.This mho circle expansion guarantees safeand selective operation for all types offaults, even for close-in faults.

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Elimination of interference signals

Digital filters render the unit immune tointerference signals contained in the meas-ured values. In particular, the influence ofDC components, capacitive voltage trans-formers and frequency changes is consider-ably reduced. A special measuring methodis employed in order to assure protectionselectivity during saturation of the currenttransformers.

Measuring voltage monitoring

Tripping of the distance protection isblocked automatically in the event of fail-ure of the measuring voltage, thus prevent-ing spurious tripping.

The measuring voltage is monitored by theintegrated fuse failure monitor. Distanceprotection is blocked if either the fuse fail-ure monitor or the auxiliary contact of thevoltage transformer protection switch op-erates and, in this case, the EMERGENCYdefinite-time overcurrent protection canbe activated.

Power swing detection (ANSI 68, 68T)

Dynamic transient reactions, for instanceshort-circuits, load fluctuations,auto-reclosures or switching operationscan cause power swings in the transmissionnetwork. During power swings, large cur-rents along with small voltages can causeunwanted tripping of distance protectionrelays. To avoid uncontrolled tripping ofthe distance protection and to achieve con-trolled tripping in the event of loss of syn-chronism, the 7SD52/53 relay is equippedwith an efficient power swing detectionfunction. Power swings can be detectedunder symmetrical load conditions as wellas during single-pole auto-reclosures.

Tele (pilot) protection for distance protection(ANSI 85-21)

A teleprotection function is available forfast clearance of faults up to 100 % of theline length. The following operating modesmay be selected:

• PUTT, permissive underreaching zonetransfer trip

• POTT, permissive overreaching zonetransfer trip

• UNBLOCKING

• BLOCKING

• Directional comparison pickup

• Pilot-wire comparison

• Reverse interlocking

Fig. 7/52

Power swing current and voltage wave forms

Fig. 7/53

Power swingcircle diagram

• DUTT, direct underreaching zone trans-fer trip (together with Direct TransferTrip function)

The carrier send and receive signals areavailable as binary inputs and outputs andcan be freely assigned to each physical relayinput or output. At least one channel is re-quired for each direction.

Common transmission channels arepower-line carrier, microwave radio andfiber-optic links. The serial protection datainterface can be used for direct connectionto a digital communication network, fiber-optic or pilot-wire link as well.

7SD52/53 also permits the transfer ofphase-selective signals. This feature is par-ticularly advantageous as it ensures reliablesingle-pole tripping, if two single-polefaults occur on different lines. The trans-mission methods are suitable also for lineswith three ends (three-terminal lines).

Phase-selective transmission is also possi-ble with multi-end applications, if someuser-specific linkages are implemented byway of the integrated CFC logic. Duringdisturbances in the transmission receiveror on the transmission circuit, the tele-protection function can be blocked by a bi-nary input signal without losing the zoneselectivity. The control of the overreachzone Z1B (zone extension) can be switchedover to the auto-reclosure function.A transient blocking function (Current re-versal guard) is provided in order to sup-press interference signals during trippingof parallel lines.

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Direct transfer tripping

Under certain conditions on the powersystem it is necessary to execute remotetripping of the circuit-breaker. The7SD52/53 relay is equipped with phase-selective intertripping signal inputs andoutputs.

Weak-infeed protection: echo and/or trip(ANSI 27 WI)

To prevent delayed tripping of permissiveschemes during weak or zero infeed situa-tions, an echo function is provided.If no fault detector is picked up at theweak-infeed end of the line, the signalreceived here is returned as echo to allowaccelerated tripping at the strong infeedend of the line. It is also possible to initiatetripping at the weak-infeed end. A phase-selective 1-pole or 3-pole trip is issued if apermissive trip signal (POTT or Unblock-ing) is received and if the phase-earth volt-age drops correspondingly. As an option,the weak-infeed logic can be equipped ac-cording to a French specification.

Directional ground(earth)-fault protectionfor high-resistance faults(ANSI 50N, 51N, 67N)

In grounded (earthed) networks, it mayhappen that the distance protection sensi-tivity is not sufficient to detect high-resis-tance ground (earth) faults. The 7SD52/53protection relay has therefore protectionfunctions for faults of this nature.

The ground (earth)-fault overcurrent pro-tection can be used with 3 definite-timestages and one inverse-time stage (IDMT).A 4th definite-time stage can be applied in-stead of the 1st inverse-time stage.

Inverse-time characteristics according toIEC 60255-3 and ANSI/IEEE are provided(see “Technical data”). An additional loga-rithmic inverse-time characteristic is alsoavailable.

The direction decision can be determinedby the neutral current and the zero-sequence voltage or by the negative-sequence components V2 and I2. In addi-tion or as an alternative to the directionaldetermination with zero-sequence voltage,the star-point current of a grounded(earthed) power transformer may also beused for polarization. Dual polarizationapplications can therefore be fulfilled.Alternatively, the direction can be deter-mined by evaluation of zero-sequence

power. Each overcurrent stage can be set inforward or reverse direction or for both di-rections (non-directional). As an optionthe 7SD52/53 relay can be provided with asensitive neutral (residual) current trans-former. This feature provides a measuringrange for the neutral (residual) currentfrom 5 mA to 100 A with a nominal relaycurrent of 1 A and from 5 mA to 500 Awith a nominal relay current of 5 A. Thusthe ground (earth)-fault overcurrent pro-tection can be applied with extreme sensi-tivity.

The function is equipped with special digi-tal filter algorithms, providing the elimina-tion of higher harmonics. This featureis particularly important for low zero-sequence fault currents which usually havea high content of 3rd and 5th harmonics.Inrush stabilization and instantaneousswitch-onto-fault trip can be activated sep-arately for each stage as well.

Different operating modes can be selected.The ground(earth)-fault protection is suit-able for three-phase and, optionally, forsingle-phase tripping by means of a sophis-ticated phase selector. It may be blockedduring the dead time of single-pole auto-reclose cycles or during pickup of the dis-tance protection.

Tele (pilot) protection for directionalground(earth)-fault protection(ANSI 85-67N)

The directional ground(earth)-faultovercurrent protection can be combinedwith one of the following teleprotectionschemes:

• Directional comparison

• BLOCKING

• UNBLOCKING

The transient blocking function (currentreversal guard) is also provided in order tosuppress interference signals during trip-ping of parallel lines.

The pilot functions for distance protectionand for ground(earth)-fault protection canuse the same signaling channel or two sep-arate and redundant channels.

Backup overcurrent protection(ANSI 50, 50N, 51, 51N)

The 7SD52/53 provides a backup over-current protection. Two definite-timestages and one inverse-time stage (IDMTL)are available, separately for phase currentsand for the neutral (residual) current. Twooperating modes are selectable. The func-tion can run in parallel to the differential

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protection and the distance protectionor only during interruption of the protec-tion communication and/or failure ofthe voltage in the VT secondary circuit(emergency operation). The secondaryvoltage failure can be detected by the inte-grated fuse failure monitor or via a binaryinput from a VT miniature circuit-breaker(VT m.c.b. trip).

The following inverse-time characteristicsaccording to IEC 60255-3 and ANSI/IEEEare provided:

• Inverse

• Short inverse

• Long inverse

• Moderately inverse

• Very inverse

• Extremely inverse

• Definite inverse

STUB bus overcurrent protection(ANSI 50(N)-STUB)

The STUB bus overcurrent protection isa separate definite-time overcurrent stage.It can be activated from a binary inputsignaling the open line isolator (discon-nector) is open. Settings are available forphase and ground (earth)-faults.

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Instantaneous high-speed switch-onto-fault overcurrent protection (ANSI 50HS)

Instantaneous tripping is possible whenenergizing a faulty line. In the event oflarge fault currents, the high-speedswitch-onto-fault overcurrent stage caninitiate very fast 3-pole tripping.

With lower fault currents, instantaneoustripping after switch-onto-fault is also pos-sible

− if the breaker positions at the line endsare monitored and connected to the re-lays. This breaker position monitor offersa high-speed trip during switch-onto-fault conditions.

− with the overreach distance zone Z1B orjust with pickup in any zone.

The switch-onto-fault initiation can be de-tected via the binary input "manual close"or automatically via measurement.

Fault locator

The integrated fault locator calculates thefault impedance and the distance-to-fault.The result is displayed in ohms, miles, kilo-meters or in percent of the line length. Par-allel line and load current compensation isalso available.

As an option for a line with two ends, afault locator function with measurement atboth ends of the line is available.Thanks to this feature, accuracy of mea-surement on long lines under high loadconditions and high fault resistances isconsiderably increased.

Overvoltage protection, undervoltage pro-tection (ANSI 59, 27)

A voltage rise can occur on long lines thatare operating at no-load or are only lightlyloaded. The 7SD52/53 contains a numberof overvoltage measuring elements. Eachmeasuring element is of two-stage design.The following measuring elements areavailable:

• Phase-to-earth overvoltage

• Phase-to-phase overvoltage

• Zero-sequence overvoltageThe zero-sequence voltage can be con-nected to the 4th voltage input or be de-rived from the phase voltages.

• Positive-sequence overvoltage of the lo-cal end or calculated for the remote endof the line (compounding).

• Negative-sequence overvoltage

Tripping by the overvoltage measuringelements can be effected either at the localcircuit-breaker or at the remote station bymeans of a transmitted signal.

The 7SD52/53 is fitted, in addition, withthree two-stage undervoltage measuringelements:

• Phase-to-earth undervoltage

• Phase-to-phase undervoltage

• Positive-sequence undervoltage

The undervoltage measuring elements canbe blocked by means of a minimum cur-rent criterion and by means of binary in-puts.

Frequency protection (ANSI 81O/U)

Frequency protection can be used for over-frequency and underfrequency protection.Unwanted frequency changes in the net-work can be detected and the load can beremoved at a specified frequency setting.Frequency protection can be used over awide frequency range (45 to 55, 55 to65 Hz). There are four elements (selectableas overfrequency or underfrequency) andeach element can be delayed separately.

Breaker failure protection (ANSI 50BF)

The 7SD52/53 relay incorporates a two-stage breaker failure protection to detectthe failure of tripping command execution,for example due to a defective ciruit-breaker. The current detection logic isphase-segregated and can therefore alsobe used in single-pole tripping schemes. Ifthe fault current is not interrupted after asettable time delay has expired, a retripcommand or a busbar trip command isgenerated. The breaker failure protectioncan be initiated by all integrated protectionfunctions as well as by external devices viabinary input signals.

Auto-reclosure (ANSI 79)

The 7SD52/53 relay is equipped with anauto-reclose function (AR). The functionincludes several operating modes:

• 3-pole auto-reclosure for all types offaults; different dead times are availabledepending the type of fault

• 1-pole auto-reclosure for 1-phase faults,no reclosing for multi-phase faults

• 1-pole auto-reclosure for 1-phase faultsand for 2-phase faults without earth, noreclosing for multi-phase faults

• 1-pole auto-reclosure for 1-phase and3-pole auto-reclosing for multi-phasefaults

• 1-pole auto-reclosure for 1-phase faultsand 2-phase faults without earth and3-pole auto-reclosure for other faults

• Multiple-shot auto-reclosure

• Interaction with an external device forauto-reclosure via binary inputs and out-puts

• Control of the integrated AR function byexternal protection

• Adaptive auto-reclosure. Only one lineend is closed after the dead time. If thefault persists this line end is switched off.Otherwise the other line ends are closedvia a command over the communicationlinks. This avoids stress when heavy faultcurrents are fed from all line ends again.

• Interaction with the internal or an exter-nal synchro-check

• Monitoring of the circuit-breaker auxil-iary contacts

In addition to the above-mentioned oper-ating modes, several other operating prin-ciples can be employed by means of theintegrated programmable logic (CFC).

Integration of auto-reclosure in the feederprotection allows evaluation of theline-side voltages. A number of voltage-dependent supplementary functions arethus available:

• DLCBy means of dead-line check, reclosure iseffected only when the line isdeenergized (prevention of asynchro-nous breaker closure).

• ADTThe adaptive dead time is employed onlyif auto-reclosure at the remote stationwas successful (reduction of stress onequipment).

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• RDTReduced dead time is employed in con-junction with auto-reclosure where notele-protection method is employed:When faults within the zone extension,but external to the protected line, areswitched off for rapid auto-reclosure(RAR), the RDT function decides on thebasis of measurement of the return volt-age from the remote station which has nottripped whether or not to reduce the deadtime.

Synchronism check (ANSI 25)

Where two network sections are switchedin by control command or following a3-pole auto-reclosure, it must be ensuredthat both network sections are mutuallysynchronous. For this purpose, a synchro-nism-check function is provided. Afterverification of the network synchronismthe function releases the CLOSE com-mand. Alternatively, reclosing can be en-abled for different criteria, e.g., checkingthat the busbar or line is not carrying avoltage (dead line or dead bus).

Thermal overload protection (ANSI 49)

A built-in overload protection with a cur-rent and thermal alarm stage is providedfor the thermal protection of cables andtransformers. The trip time characteristicsare exponential functions according toIEC 60255-8. The preload is thus consid-ered in the trip times for overloads. An ad-justable alarm stage can initiate an alarmbefore tripping is initiated.

Monitoring and supervision functions

The 7SD52/53 relay provides comprehen-sive monitoring functions covering bothhardware and software. Furthermore, themeasured values are continuously checkedfor plausibility. Therefore the current andvoltage transformers are also included inthis monitoring system.

Current transformer / Monitoring functions

A broken wire between the CTs and relayinputs under load may lead to malopera-tion of a differential relay if the load cur-rent exceeds the differential setpoint. The7SD52/53 provides fast broken wire super-vision which immediatelly blocks all lineends if a broken wire condition is mea-sured by a local relay. This avoids mal-operation due to broken wire condition.Only the phase where the broken wire isdetected is blocked. The other phasesremain under differential operation.

Fuse failure monitoring

If any measured voltage is not present dueto short-circuit or open circuit in the volt-age transformer secondary circuit the dis-tance protection would respond with anunwanted trip due to this loss of voltage.This secondary voltage interruption can bedetected by means of the integrated fusefailure monitor. Immediate blocking ofdistance protection is provided for all typesof secondary voltage failures.

Additional measurement supervision func-tions are

• Symmetry of voltages and currents

• Summation of currents and voltages

Trip circuit supervision (ANSI 74TC)

One or two binary inputs for each circuit-breaker pole can be used for monitoringthe circuit-breaker trip coils including theconnecting cables. An alarm signal is is-sued whenever the circuit is interrupted.

Lockout (ANSI 86)

All binary outputs can be stored like LEDsand reset using the LED reset key. Thelockout state is also stored in the event ofsupply voltage failure. Reclosure can onlybe issued after the lockout state is reset.

Local measured values

The measured values are calculated fromthe measured current and voltage signals

along with the power factor (cos ϕ), thefrequency, the active and reactive power.Measured values are displayed as primaryor secondary values or in percent of thespecific line rated current and voltage. Therelay uses a 20 bit high-resolution AD con-verter and the analog inputs are factory-calibrated, so a high accuracy is reached.The following values are available for mea-sured-value processing:

• Currents 3 x IPhase, 3 I0, IE, IE sensitive

• Voltages 3 x VPhase-Ground, 3 x VPhase-Phase,3 V0,Ven, VSYNC, VCOMP

• Symmetrical components I1, I2, V1, V2

• Real power P (Watt), reactive powerQ (Var), apparent power S (VA)

• Power factor PF (= cos ϕ)

• Frequency f

• Differential and restraint current perphase

• Load impedances with directional indica-tion3 x RPhase-Ground, XPhase-Ground

3 x RPhase-Phase, XPhase-Phase

• Long term mean values3 x IPhase; I1; P; P+; P-; Q; Q+; Q-; S

• Minimum/maximum memory3 x IPhase; I1; 3 x VPhase-Ground

3 x VPhase-Phase, 3V0; V1; P+; P-; Q+; Q-; S;f; power factor (+); power factor (-);from mean values3 x IPhase; I1; P; Q; S

• Energy metersWp+; Wp-; WQ+; WQ-

• Availability of the data connection to theremote line ends per minute and per hour

• Regarding delay time measuring with theGPS-version the absolute time for trans-mit and receive path is displayed sepa-rately.

Limit value monitoring: Limit valuesare monitored by means of the CFC.Commands can be derived from theselimit value indications.

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Measured values at remote line ends

Every two seconds the currents and volt-ages are freezed at the same time at allline ends and transmitted via the commu-nication link. At a local line end, currentsand voltages are thus available with theiramount and phases (angle) locally and re-motely. This allows checking the wholeconfiguration under load conditions. Inaddition, the differential andrestraint currents are also displayed.Important communication measurements,such as delay time or faulty telegrams perminute/hour are also available as measure-ments. These measured values can be pro-cessed with the help of the CFC logiceditor.

Commissioning

Special attention has been paid to commis-sioning. All binary inputs and outputs canbe displayed and activated directly. Thiscan simplify the wiring check significantlyfor the user. The operational and faultevents and the fault records are clearly ar-ranged.

Furthermore, all currents and optionalvoltages and phases are available via com-munication link at the local relay and aredisplayed in the relay, with DIGSI 4 or withthe Web Monitor.

The operational and fault events and faultrecords from all line ends share a commontime tagging which allows to compareevents registered in the different lineends on a common time base.

WEB Monitor – Internet technologysimplifies visualization

In addition to the universal DIGSI 4 oper-ating program, the relay contains a WEBserver that can be accessed via a telecom-munication link using a browser (e.g.Internet Explorer). The advantage of thissolution is to operate the unit with stan-dard software tools and at the same timemake use of the Intranet/Internet infra-structure. This program shows the protec-tion topology and comprehensivemeasurements from local and remote lineends. Local and remote measurements areshown as phasors and the breakerpositions of each line end are depicted. It ispossible to check the correct connection ofthe current transformers or the correctvector group of a transformer.

Fig. 7/55Browser-aided commissioning: Phasor diagram

Fig. 7/56Browser-aided commissioning:Differential protection tripping characteristic

Stability can be checked by using the oper-ating characteristic as well as the calculateddifferential and restraint values in thebrowser windows.If the distance protection is active, then thevalid zone characteristic (quadrilateral/mho) is displayed.

Event log and trip log messages are alsoavailable. Remote control can be used, ifthe local front panel cannot be accessed.

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� Control and automation functions

Control

In addition to the protection functions, theSIPROTEC 4 units also support all controland monitoring functions that are requiredfor operating medium-voltage or high-voltage substations.

The main application is reliable control ofswitching and other processes.

The status of primary equipment or auxil-iary devices can be obtained from auxiliarycontacts and communicated via binary in-puts. Therefore it is possible to detect andindicate both the OPEN and CLOSED po-sition or a fault or intermediate circuit-breaker or auxiliary contact position.

The switchgear or circuit-breaker can becontrolled via:

− integrated operator panel

− binary inputs

− substation control and protection system

− DIGSI 4

Command processing

All the functionality of command process-ing is offered. This includes the processingof single and double commands with orwithout feedback, sophisticated monitor-ing of the control hardware and software,checking of the external process, controlactions using functions such as runtimemonitoring and automatic command ter-mination after output. Here are some typi-cal applications:

• Single and double commands using 1,1 plus 1 common or 2 trip contacts

• User-definable bay interlocks

• Operating sequences combining severalswitching operations such as control ofcircuit-breakers, disconnectors andearthing switches

• Triggering of switching operations, indi-cations or alarm by combination withexisting information

Automation / user-defined logic

With integrated logic, the user can set, via agraphic interface (CFC), specific functionsfor the automation of switchgear or substa-tion. Functions are activated via functionkeys, binary input or via communicationinterface.

Switching authority

Switching authority is determined accord-ing to parameters, communication or bykey-operated switch (when available).

If a source is set to “LOCAL”, only localswitching operations are possible. The fol-lowing sequence of switching authority islaid down: “LOCAL”; DIGSI PC program,“REMOTE”

Every switching operation and change ofbreaker position is kept in the status indi-cation memory. The switch commandsource, switching device, cause (i.e. spon-taneous change or command) and result ofa switching operation are retained.

Assignment of feedback to command

The positions of the circuit-breaker orswitching devices and transformer taps areacquired by feedback. These indication in-puts are logically assigned to the corre-sponding command outputs. The unit cantherefore distinguish whether the indica-tion change is a consequence of switchingoperation or whether it is a spontaneouschange of state (intermediate position).

Chatter disable

The chatter disable feature evaluateswhether, in a configured period of time,the number of status changes of indicationinput exceeds a specified figure. If ex-ceeded, the indication input is blocked fora certain period, so that the event list willnot record excessive operations.

Filter time

All binary indications can be subjected to afilter time (indication suppression).

Indication filtering and delay

Indications can be filtered or delayed.

Filtering serves to suppress brief changes inpotential at the indication input. The indi-cation is passed on only if the indicationvoltage is still present after a set period oftime. In the event of indication delay, thereis a wait for a preset time. The informationis passed on only if the indication voltage isstill present after this time.

Indication derivation

A further indication (or a command) canbe derived from an existing indication.Group indications can also be formed. Thevolume of information to the system inter-face can thus be reduced and restricted tothe most important signals.

Transmission lockout

A data transmission lockout can be acti-vated, so as to prevent transfer of informa-tion to the control center during work ona circuit bay.

Test operation

During commissioning, all indications canbe passed to an automatic control systemfor test purposes.

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Communication

With respect to communication, particularemphasis has been placed on high levels offlexibility, data integrity and utilization ofstandards common in energy automation.The design of the communication modulespermits interchangeability on the onehand, and on the other hand providesopenness for future standards (for exam-ple, Industrial Ethernet).

Local PC interface

The PC interface accessible from the frontof the unit permits quick access to all pa-rameters and fault event data. Of particularadvantage is the use of the DIGSI 4 operat-ing program during commissioning.

Rear-mounted interfaces

Two communication modules located onthe rear of the unit incorporate optionalequipment complements and readily per-mit retrofitting. They assure the ability tocomply with the requirements of differentcommunication interfaces.

The interfaces make provision for the fol-lowing applications:

• Service /modem interfaceBy means of the RS232/RS485 or opticalinterface, it is possible to efficiently oper-ate a number of protection units cen-trally via DIGSI 4 or standard browser.Remote operation is possible on connec-tion of a modem. This offers the advan-tage of rapid fault clarification, especiallyin the case of unmanned power plants.

With the optical version, centralized op-eration can be implemented by means ofa star coupler.

• System interfaceThis interface is used to carry out com-munication with a control or protectionand control system and supports a var-iety of communication protocols and in-terface designs, depending on the mod-ule connected.

Commissioning aid via a standard Webbrowser

In the case of the 7SD52/53, a PC with astandard browser can be connected to thelocal PC interface or to the service interface(refer to “Commissioning program”).The relays include a small Web server thatsends its HTML pages to the browser viaan established dial-up network connection.

Retrofitting: Modules for every type ofcommunication

Communication modules for retrofittingare available for the entire SIPROTEC 4unit range. These ensure that, where differ-ent communication interfaces (electrical oroptical) and protocols (IEC 61850Ethernet, IEC 60870-5-103,PROFIBUS-FMS/-DP, DNP 3.0, DIGSI,etc.) are required, such demands can bemet.

Safe bus architecture

• RS485 busWith this data transmission via copperconductors electromagnetic fault influ-ences are largely eliminated by the use oftwisted-pair conductors. Upon failure ofa unit, the remaining system continues tooperate without any disturbances.

• Fiber-optic double ring circuitThe fiber-optic double ring circuit is im-mune to electromagnetic interference.Upon failure of a section between twounits, the communication system con-tinues to operate without disturbance.

It is generally impossible to communicatewith a unit that has failed. If a unit were tofail, there is no effect on the communica-tion with the rest of the system.

Fig. 7/57IEC 60870-5-103 star-type RS232 copperconductor connection or fiber-optic connection

Fig. 7/58Bus structure for station bus withEthernet and IEC 61850

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Fig. 7/61Fiber-optic communication module

Communication

IEC 61850 Ethernet

Since 2004, the Ethernet-basedIEC 61850 protocol is the world-wide standard for protection andcontrol systems used by powersupply corporations. Siemens wasthe first manufacturer to supportthis standard. By means of thisprotocol, information can also beexchanged directly between bayunits so as to set up simple master-less systems for bay and system in-terlocking. Access to the units viathe Ethernet bus is also possiblewith DIGSI.

IEC 60870-5-103

IEC 60870-5-103 is an internation-ally standardized protocol for theefficient communication in theprotected area. IEC 60870-5-103 issupported by a number of protec-tion device manufacturers and isused worldwide.

PROFIBUS-DP

PROFIBUS-DP is an industry-recognized standard for communi-cations and is supported by a num-ber of PLC and protection devicemanufacturers.

DNP 3.0

DNP 3.0 (Distributed NetworkProtocol Version 3) is a messaging-based communication protocol.The SIPROTEC 4 units are fullyLevel 1 and Level 2 compliant withDNP 3.0. DNP 3.0 is supported bya number of protection devicemanufacturers.

Fig. 7/59R232/RS485 electrical communication module

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Fig. 7/60Communication module, optical double-ring

Fig. 7/63System solution: Communications

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Fig. 7/62Fiber-optic Ethernet communication module forIEC 61850 with integrated Ethernet switch

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Communication

System solutions for protection and stationcontrol

Together with the SICAM power automa-tion system, SIPROTEC 4 can be used withPROFIBUS-FMS. Over the low-cost elec-trical RS485 bus, or interference-free viathe optical double ring, the units exchangeinformation with the control system.

Units featuring IEC 60870-5-103 interfacescan be connected to SICAM in parallel viathe RS485 bus or radially by fiber-opticlink. Through this interface, the system isopen for the connection of units of othermanufacturers (see Fig. 7/57).

Because of the standardized interfaces,SIPROTEC units can also be integratedinto systems of other manufacturers or inSIMATIC. Electrical RS485 or optical in-terfaces are available. The optimum physi-cal data transfer medium can be chosenthanks to opto-electrical converters. Thus,the RS485 bus allows low-cost wiring inthe cubicles and an interference-free opti-cal connection to the master can be estab-lished.

For IEC 61850, an interoperable system so-lution is offered with SICAM PAS. Via the100 Mbits/s Ethernet bus, the units arelinked with PAS electrically or optically tothe station PC. The interface is standard-ized, thus also enabling direct connectionof units of other manufacturers to theEthernet bus. With IEC 61850, however,the units can also be used in other manu-facturers' systems (see Fig. 7/58).

Via modem and service interface, the pro-tection engineer has access to the protec-tion devices at all times. This permitsremote maintenance and diagnosis (cyclictesting).

Parallel to this, local communication ispossible, for example, during a major in-spection.

Serial protection data interface(R2R interface)

As an option, the 7SD52/53 provides oneor two protection data interfaces to covertwo up to six line end applications in ringor chain topology and hot standby com-munication between two line ends.

In addition to the differential protectionfunction, other protection functions canuse this interface to increase selectivity andsensitivity as well as covering advanced ap-plications.

• Fast phase-selective teleprotection signal-ing for distance protection, optionallywith POTT or PUTT schemes

• Two and three-terminal line applicationscan be implemented without additionallogic

• Signaling for directional ground(earth)-fault protection – directional compari-son for high-resistance faults in solidlyearthed systems

• Echo function

• Interclose command transfer with theauto-reclosure “Adaptive dead time”(ADT) mode

• 28 remote signals for fast transfer ofbinary signals

Flexible utilization of the communicationchannels by means of the programmableCFC logic

The protection data interfaces have differ-ent options to cover new and existing com-munication infrastructures.

• FO51), OMA12) module:820 nm fiber-optic interface with clockrecovery/ST connectors for direct con-nection with multi-mode FO cable up to1.5 km for the connection to a commu-nication converter.

• FO61), OMA22) module:820 nm fiber-optic interface/ST connec-tors for direct connection up to 3.5 kmwith multi-mode FO cable.

New fiber-optic interfaces, series FO1x

• FO171): For direct connectionup to 24 km3), 1300 nm, for mono-modefiber 9/125 μm, LC-Duplex connector

• FO181): For direct connection up to60 km3), 1300 nm, for mono-mode fiber9/125 μm, LC-Duplex connector

• FO191): For direct connection up to100 km3), 1550 nm, for mono-modefiber 9/125 μm, LC-Duplex connector

The link to a multiplexed communicationnetwork is made by separate communica-tion converters (7XV5662). These havea fiber-optic interface with 820 nm and2 ST connectors to the protection relay.The link to the communication networkis optionally an electrical X21 or aG703/-E1/-T1 interface.

For operation via copper wire communica-tion (pilot wires or twisted telephone pair),a modern communication converter forcopper cables is available. This operateswith both the two-wire and three-wirecopper connections which were used byconventional differential protection sys-tems before. The communication con-verter for copper cables is designed for5 kV insulation voltage. An additional20 kV isolation transformer can extend thefield of applications of this technique intoranges with higher insulation voltage re-quirements. The connection via FO cableto the relay is interference-free. WithSIPROTEC 4 and the communication con-verter for copper cables a digital follow-uptechnique is available for two-wire protec-tion systems (typical 15 km) and allthree-wire protection systems using exist-ing copper communication links.

Different communication converters arelisted under "Accessories".

Communication data:

• 32-bit CRC-check according to CCITTand ITU

• Each protection relay possesses a uniquerelay address

• Continuous communication link super-vision: Individual faulty data telegramsdo not constitute an immediate danger,if they occur only sporadically. The sta-tistical availability, per minute and hour,of the serial protection data interface canbe displayed.

• Supported network interfaces X21/RS422with 64 or 128 or 512 kbit/s; or G703-64 kbit/s and G703-E1 (2,048 kbit/s) orG703-T1 (1,554 kbit/s).

• Max. channel delay time 0.1 ms to 30 ms(in steps of 0.1 ms)

• Protocol HDLC

1) For flush-mounting housing.

2) For surface-mounting housing.

3) For surface-mounting housing the internalFO module OMA1 will be deliveredtogether with an external repeater.

Communication possibilities between relays

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Communication

Fig. 7/64Direct optical link up to 1.5 km/3.5 km, 820 nm

Fig. 7/65Direct optical link up to 25/60 km with 1300 nmor up to 100 km with 1550 nm

Fig. 7/66Connection to a communication network CC-XG

Fig. 7/68Connection to a pilot wire

Fig. 7/67Connection to a communication network CC-2M

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Typical connection

Typical connection for currentand voltage transformers

3 phase current transformers with neutralpoint in the line direction, I4 connected assummation current transformer (=3I0):Holmgreen circuit

3 voltage transformers, without connectionof the broken (open) delta winding on theline side; the 3V0 voltage is derived inter-nally.

Note:Voltage inputs are always available in therelay. But there is no need to connect it tovoltage transformers for the differentialprotection function.

Alternative current measurement

The 3 phase current transformers are con-nected in the usual manner. The neutralpoint is in line direction. I4 is connected toa separate neutral core-balance CT, thuspermitting a high sensitive 3I0 measure-ment.

Note: Terminal Q7 of the I4 transformermust be connected to the terminal of thecore-balance CT pointing in the same di-rection as the neutral point of the phasecurrent transformers (in this case in linedirection). The voltage connection is ef-fected in accordance with Fig. 7/69, 7/74or 7/75.

Fig. 7/69Example of connection for current and voltage transformers

Fig. 7/70Alternative connection of current transformers for sensitiveground(earth)-current measuring with core-balance current transformers

Alternative current connection

3 phase current transformers with neutralpoint in the line direction, I4 connected toa current transformer in the neutral pointof a grounded (earthed) transformer fordirectional ground(earth)-fault protection.The voltage connection is effected in ac-cordance with Fig. 7/69, 7/74 or 7/75.

Alternative current connection

3 phase current transformers with neutralpoint in the line direction, I4 connected tothe summation current of the parallel linefor parallel line compensation on overheadlines. The voltage connection is effected inaccordance with Fig. 7/69, 7/74 or 7/75.

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Typical connection

Fig. 7/71 Alternative connection of current transformers for measuringneutral current of a grounded (earthed) power transformer

Fig. 7/72 Alternative connection of current transformers for measuringthe ground (earth) current of a parallel line

Fig. 7/73 Connection of current transformer withrestricted earth-fault protection (REF)

Alternative voltage connection

3 phase voltage transformers, V4 connectedto broken (open) delta winding (Ven) foradditional summation voltage monitoringand ground(earth)-fault directional pro-tection. The current connection is effectedin accordance with Fig. 7/69, 7/70, 7/71and 7/72.

Alternative voltage connection

3 phase voltage transformers, V4 connectedto busbar voltage transformer for synchro-check.

Note: Any phase-to-phase or phase-to-ground(earth) voltage may be employed asthe busbar voltage. Parameterization is car-ried out on the unit. The current connec-tion is effected in accordance withFig. 7/69, 7/70, 7/71 and 7/72.

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Typical connection

Fig. 7/74 Alternative connection of voltage transformers for measuring thedisplacement voltage (e-n voltage)

Fig. 7/75 Alternative connection of voltage transformers for measuring thebusbar voltage

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Technical data

General unit data

Analog inputs

Rated frequency 50 or 60 Hz (selectable)

Rated current IN 1 or 5 A (selectable, controlled byfirmware)

Rated voltage 80 to 125 V (selectable)

Power consumptionIn CT circuits with IN = 1 AIn CT circuits with IN = 5 AIn VT circuits

Approx. 0.05 VAApprox. 0.30 VAApprox. 0.10 VA

Thermal overload capacityIn CT circuits (for IN = 5A)

In VT circuits

100 x IN for 1 s30 x IN for 10 s4 x IN continuous

230 V, continuous per phase

Dynamic overload capacityIn CT circuitsIn the CT circuit for high sensitiveearth-fault protection(refer to ordering code)

250 x IN (one half cycle)

Auxiliary voltage

Rated voltage 24 to 48 V DC60 to 125 V DC 1)

110 to 250 V DC 1)

and 115 V AC with 50/60 Hz1)

Permissible tolerance -20 % to +20 %

Max. superimposed AC voltage(peak-to-peak)

≤ 15 %

Power consumptionDuring normal operationDuring pickup with all inputsand outputs activated

Approx. 8 WApprox. 18 W

Bridging time during auxiliaryvoltage failure Vaux 110 V ≥ 50 ms

Binary inputs

QuantityFunction can be assigned

8 or 16 or 24

Minimum permissible voltageRange is selectable with jumpersfor each binary input

17 or 73 or 154 V DC, bipolar(3 operating ranges)

Maximum permissible voltage 300 V DC

Current consumption, energized Approx. 1.8 mA

Output relays

QuantityFunction can be assigned

16 or 24 or 32

Switching capacityMakeBreakBreak (for resistive load)Break (for τ = L/R ≤ 50 ms)

1000 W /VA30 VA40 W25 VA

Switching voltage 250 V

Permissible current 30 A for 0.5 s5 A continuous

LEDs

Quantity

RUN (green) 1

ERROR (red) 1

Indication (red), function can beassigned

14

Unit design

Housing 7XP201/2 x 19″ or 1/1 x 19″

See dimension drawings, part 17

Degree of protection acc. to EN 60529Surface-mounting housingFlush-mounting housing

RearFront

For the terminals

IP 51

IP 50IP 51IP 20 with terminal cover put on

WeightFlush-mounting housing

1/2 x 19″1/1 x 19″

Surface-mounting housing1/2 x 19″1/1 x 19″

6 kg10 kg

11 kg19 kg

Serial interfaces (front of unit)

Operating interface 1 for DIGSI 4 or browser

Connection Front panel, non-isolated, RS232,9-pin subminiature connector

Baud rate 4800 to 115200 baud

Time synchronization (rear of unit)

IRIG-B/DCF77/SCADA or 1 sec pulse from GPS (format IRIG-B000)

Connection 9-pin subminiature connector(SUB-D)

Voltage levels 5 or 12 or 24 V

Dielectric test 500 V/50 Hz

Service interface (operating interface 2) for DIGSI 4 / modem / service

Isolated RS232/RS485Dielectric testDistance for RS232Distance for RS485, depends onthe baud rate

9-pin subminiature connector500 V/50 HzMax. 15 mMax. 1000 m

Fiber-opticOptical wavelengthPermissible attenuationDistance

Integrated ST connectorλ = 820 nmMax. 8 dB for glass-fiber 62.5/125 µmMax. 1.5 km

System interface

(refer to ordering code) IEC 61850 EthernetIEC 60870-5-103PROFIBUS-FMSPROFIBUS-DPDNP 3.0

Isolated RS232/RS485Baud rateDielectric testDistance for RS232Distance for RS485

9-pin subminiature connector4800 to 38400 baud500 V/50 HzMax. 15 mMax. 1000 m

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1) Ranges are settable by means of jumpers.

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Technical data

System interface, continued

PROFIBUS RS485Dielectric testBaud rateDistance

500 V/50 HzMax. 12 Mbaud1 km at 93.75 kB; 100 m at 12 MB

PROFIBUS fiber-optic2)

Only for flush-mounting housingFor surface-mounting housingBaud rateOptical wavelengthPermissible attenuationDistance

ST connectorOptical interface with OLM2)

Max. 1.5 Mbaudλ = 820 nmMax. 8 dB for glass-fiber 62.5/125 μm500 kB/s 1.6 km, 1500 kB/s 530 m

Protection data interface (R2R interface)

FO51), OMA12): Fiber-optic interfacewith clock recovery for direct connec-tion up to 1.5 km or for connection toa communication converter, 820 nm

For multi-mode fiber 62.5/125 μm,ST connectorsPermissible fiber attenuation 8 dB

FO61), OMA22): Fiber-optic interfacefor direct connection up to 3.5 km,820 nm

For multi-mode fiber 62.5/125 μm,ST connectorsPermissible fiber attenuation 16 dB

New fiber-optic interfaces, series FO1x

FO171): for direct connection up to24 km3), 1300 nm

For mono-mode fiber 9/125 μm,LC-Duplex connectorPermissible fiber attenuation 13 dB





Relay communication equipment

External communication converter 7XV5662-0AA00for communication networks X21/G703-64 kbit/s

External communication converter tointerface between the relays, optical820 nm interface and the X21(RS422)G703-64 kbit/s interface of a commu-nication device

X21/G703, RS422 selectable by jump-ers. Baud rate selectable by jumpers

Input: fiber-optic 820 nmwith clock recovery

Max. 1.5 km with 62.5/125 µmmulti-mode FO cable to device side

Output: X21 (RS422) electricalinterface on communication device

64/128/512 kbit (selectable by jumper)max. 800 m, 15-pin connector

G703-64 kbit/s electrical interface oncommunication device

64 kbit/s, max. 800 m, screw-typeterminal

External communication converter 7XV5662-0AD00for communication networks with G703-E1 or G703-T1

External communication converter tointerface between the relays, optical820 nm interface and G703-E1 orG703-T1 interface of a communica-tion network.

Inputs: 2 fiber-optic inputs 820 nm,1RS232 input

Max. 1.5 km with 62.5/125µmmulti-mode 1 FO cable to device side

Output:G703.5G703.6

E1: 2,048 kbit/sT1: 1,554 kbit/s

Electrical interface on communica-tion network

max. 800 m, screw-type terminal

External communication converter 7XV5662-0AC00 for pilot wires

External communication converterto interface between relays, optical820 nm interface and a pilot wire ortwisted telephone pair.

Typical distance 15 km

Fiber-optic 820 nm with clockrecovery

Max. 1.5 km with 62.5/125 µmmulti-mode FO cable

Pilot wire Screw-type terminal 5 kV isolated

Permissible time delay (duration of data transmission)

Delay of telegrams due to trans-mission for one unit to the other.Delay is constantly measured andadjusted

Max. 30 ms per transmission pathPermissible max. value can beselected

Electrical tests

Specifications

Standards IEC 60255 (product standards)ANSI/IEEE C37.90.0/.1/.2UL 508For further standards see“Individual functions”

Insulation tests

Standards IEC 60255-5

Voltage test (100 % test)All circuits except for auxiliarysupply, binary inputs andcommunication interfaces

2.5 kV (r.m.s.), 50/60 Hz

Auxiliary voltage and binaryinputs (100 % test)

3.5 kV DC

RS485/RS232 rear side communi-cation interfaces and timesynchronization interface(100 % test)

500 V (r.m.s.), 50/60 Hz

Impulse voltage test (type test)All circuits except for communi-cation interfaces and time syn-chronization interface, class III

5 kV (peak); 1.2/50 μs; 0.5 J3 positive and 3 negative impulses atintervals of 5 s

EMC tests for noise immunity; type tests

Standards IEC 60255-6, IEC 60255-22(product standards) (type tests)EN 50082-2 (generic standard)DIN 57435 part 303

High frequency testIEC 60255-22-1, class III andVDE 0435 part 303, class III

2.5 kV (peak); 1 MHz; τ = 15 ms;400 surges per s;test duration 2 s

Electrostatic dischargeIEC 60255-22-2, class IVEN 61000-4-2, class IV

8 kV contact discharge; 15 kV airdischarge; both polarities; 150 pF;Ri = 330 Ω

Irradiation with RF field,non-modulatedIEC 60255-22-3 (report), class III

10 V/m; 27 to 500 MHz

Irradiation with RF field,amplitude-modulatedIEC 61000-4-3, class III

10 V/m; 80 to 1000 MHz;80 % AM; 1 kHz

1) For flush-mounting housing.

2) For surface-mounting housing.

3) For surface-mounting housing the internal FO module OMA1will be delivered together with an external repeater.

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Technical data

Irradiation with RF field,pulse-modulated IEC 61000-4-3/ENV 50204, class III

10 V/m; 900 MHz; repetitionfrequency 200 Hz; duty cycle 50 %

Fast transients, burstsIEC 60255-22-4 andIEC 61000-4-4, class IV

4 kV; 5/50 ns; 5 kHz;burst length = 15 ms;repetition rate 300 ms;both polarities; Ri = 50 Ω;test duration 1 min

High-energy surge voltages (SURGE)IEC 61000-4-5, installation class IIIAuxiliary supply Common mode: 2 kV, 12 Ω, 9 µF

Differential mode: 1 kV; 2 Ω, 18 µF

Measurements inputs, binary inputs,binary outputs

Common mode: 2 kV, 42 Ω, 0.5 µFDifferential mode: 1 kV; 42 Ω, 0.5 µF

Line-conducted HF, amplitude-mod-ulated, IEC 61000-4-6, class III

10 V; 150 kHz to 80 MHz; 80 % AM;1 kHz

Magnetic field with power frequencyIEC 61000-4-8, class IV;IEC 60255-6

30 A/m continuous; 300 A/m for 3 s;50 Hz; 0.5 mT; 50 MHz

Oscillatory surge withstand capabilityANSI/IEEE C37.90.1

2.5 to 3 kV (peak); 1 to 1.5 MHzDamped wave; 50 surges per second;Duration 2 s; Ri = 150 Ω to 200 Ω

Fast transient surge withstandcapability, ANSI/IEEE C37.90.1

4 to 5 kV; 10/150 ns; 50 surgesper second;both polarities; duration 2 s; Ri = 80 Ω

Radiated electromagnetic interfer-ence, IEEE C37.90.2

35 V/m; 25 to 1000 MHzamplitude and pulse-modulated

Damped oscillations IEC 60894,IEC 61000-4-12

2.5 kV (peak value), polarityalternating 100 kHz1, 10 and 50 MHz, Ri = 200 Ω

EMC tests for interference emission; type tests

Standard EN 50081-* (generic standard)

Conducted interference voltage onlines, only auxiliary supply,IEC-CISPR 22

150 kHz to 30 MHzLimit class B

Radio interference field strengthIEC-CISPR 22

30 to 1000 MHzLimit class B

Mechanical dynamic tests

Vibration, shock stress and seismic vibration

During operation

Standards IEC 60255-21 and IEC 60068-2

VibrationIEC 60255-21-1, class 2IEC 60068-2-6

Sinusoidal10 to 60 Hz: ± 0.075 mm amplitude;60 to 150 Hz: 1 g accelerationfrequency sweep 1 octave/min20 cycles in 3 othogonal axes

ShockIEC 60255-21-2, class 1IEC 60068-2-27

Half-sinusoidalacceleration 5 g, duration 11 ms,3 shocks each in both directionsof the 3 axes

Seismic vibrationIEC 60255-21-2, class 1IEC 60068-3-3

Sinusoidal1 to 8 Hz: ± 3.5 mm amplitude(horizontal axis),1 to 8 Hz: ± 1.5 mm amplitude(vertical axis),8 to 35 Hz: 1 g acceleration(horizontal axis),8 to 35 Hz: 0.5 g acceleration(vertical axis),frequency sweep 1 octave/min1 cycle in 3 orthogonal axes

1) Ordering option with high-speed contacts required.

During transport

Standards IEC 60255-21 and IEC 60068-2

VibrationIEC 60255-21-1, class 2IEC 60255-2-6

Sinusoidal5 to 8 Hz: ± 7.5 mm amplitude;8 to 150 Hz: 2 g accelerationfrequency sweep 1 octave/min20 cycles in 3 orthogonal axes

ShockIEC 60255-21-2, class 1IEC 60068-2-27

Half-sinusoidalAcceleration 15 g, duration 11 ms,3 shocks each in both directionsof the 3 axes

Continuous shockIEC 60255-21-2, class 1IEC 60068-2-29

Half-sinusoidalAcceleration 10 g, duration 16 ms,1000 shocks each in both directionsof the 3 axes

Climatic stress tests

Temperatures

Type-tested acc. to IEC 60068-2-1and -2, test Bd, for 16 h

-25 °C to +85 °C / -13 °F to +185 °F

Temporarily permissible operatingtemperature, tested for 96 h

-20 °C to +70 °C / -4 °F to +158 °F

Recommended permanent operatingtemperature acc. to IEC 60255-6(Legibility of display may be im-paired above +55 °C / +131 °F)– Limiting temperature during

permanent storage– Limiting temperature during

transport

-5 °C to +55 °C / +25 °F to +131 °F

-25 °C to +55 °C / -13 °F to 131 °F

-25 °C to +70 °C / -13 °F to +158 °F

Humidity

Permissible humidity stressIt is recommended to arrange theunits in such a way, that they are notexposed to direct sunlight or pro-nounced temperature changes thatcould cause condensation.

Yearly average ≤ 75 % relative humid-ity; on 56 days in the year up to 93 %relative humidity; condensation is notpermitted

Functions

Differential protection (ANSI 87L, 87T)

Sensitive normal trip stage IDiff>

Setting range ofIDiff > secondary 1 A

secondary 5 A0.1 to 20 A (step 0.1)0.5 to 100 A

Tripping time (three line ends)IDiff > 2.5 × IDiff > (setting)

50 HzMin. 27 msTyp. 29 ms60 HzMin. 24 msTyp. 26 ms

Delay time of IDiff> trip stage

Delay time 0 to 60 s (step 0.01 s)

Capacitive current load compensation

Restraint ratioIC STAB / ICN 2 to 4 (steps 0.1)

High-set fast trip stage IDiff>>

Setting rangeIDiff>> secondary 1 A

secondary 5 A0.8 to 100 A (step 0.1)4 to 500 A (step 0.5)

Tripping time (three line ends)IDiff ≥ 2.5 × IDiff >> (setting)

Min. 9 ms1)

Typ. 12 ms1)

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Technical data

Vector group adaptation with transformers in the differential zone

Adaptation of connection symbol 0 to 11 (x 30 °) (step 1)

Neutral point connection Grounded (earthed) or not grounded(earthed) (for each winding)

Inrush restraint

Restraint ratio2nd harmonic I2fN/IfN 10 % to 45 % (step 1 %)

Max. current for restraint 1.1 A to 25 A1) (step 0.1 A)

Crossblock function Can be switched on and off

Max. operative time for crossblockToper crossblk

0 to 60 s (step 0.01 s) ordeactivated (operating up to release)

Distance protection (ANSI 21, 21N)

Distance protection zones 6, 1 of which as controlled zone, allzones can be set forward or/andreverse

Time stages for tripping delay

Setting range

6 for multi-phase faults3 for single-phase faults0 to 30 s or deactivated (steps 0.01 s)

CharacteristicSelectable separately for phaseand ground (earth) faults

(refer to ordering code)quadrilateral and/orMho (only impedance pickup)

Types of pickup Overcurrent pickup (I>);Voltage-dependent overcurrentpickup (V);Voltage-dependent and phase an-gle-dependent overcurrent pickup(V / ϕ>);Impedance pickup (Z<)

Types of tripping Three-pole for all types of faults;Single-pole for single-phase faults /otherwise three-pole;

Single-pole for single-phase faults andtwo-pole phase-to-phase faults /otherwise three-pole

Time range 0 to 30 s (step 0.01 s) or deactivated

Line angle ϕ L 30 ° to 89 ° (step 1 °)

Inclination angle for quadrilateralcharacteristic

30° to 90° (step 1°)

Quadrilateral reactance reach X 0.05 to 600 Ω(1A) / 0.01 to 120 Ω(5A)

(step 0.001 Ω)

Quadrilateral resistance reach Rfor phase-to-phase faults andphase-to-ground(earth) faults

0.05 to 600 Ω(1A) / 0.01 to 120 Ω(5A)

(step 0.001Ω)

Mho impedance reach ZR 0.05 to 200 Ω(1A) / 0.01 to 40 Ω(5A)

(step 0.01 Ω)

Minimum phase current I 0.05 to 4 A (1A) / 0.25 to 20 A (5A)

(step 0.01 A)

Overcurrent pickup I>>(for I>>, V, V/ϕ>)

0.25 to 10 A (1A) / 1.25 to 50 A (5A)

(step 0.01 A)

Minimum current pickup I>(for V, V/ϕ> and Z<)

0.05 to 4 A (1A) / 0.25 to 20 A (5A)

(step 0.01 A)

Minimum current pickup Iϕ>(for V, V/ϕ>)

0.1 to 8 A (1A) / 0.5 to 40 A (5A)

(step 0.01 A)

Undervoltage pickup (for V andV/ϕ>)

Vph-e<Vph-ph<

20 to 70 V (step 1 V)40 to 130 V (step 1 V)

Load angle pickup (for V/ϕ>)Load angle ϕLoad angle ϕ

30 ° to 80 °90 ° to 120 °

Ground(earth)-fault pickupNeutral (residual) current 3I0

(Ground current)0.05 to 4 A (1A)/ 0.25 to 20 A (5A)

(step 0.01 A)

Zero-sequence voltage 3V0>for earthed networksfor resonant-earthed networks

1 to 100 V (step 1 V) or deactivated10 to 200 V (step 1 V)

Zero-sequence compensationSelectable input formats RE/RL and XE/XL

k0 and ϕ(k0)

Separately selectable for zones Z1higher zones (Z1B, Z2 to Z5)

RE/RL and XE/XL -0.33 to 7 (step 0.01)

k0

ϕ(k0)0 to 4 (step 0.001)-135 to 135 ° (step 0.01 °)

Parallel line mutual compensationRM/RL and XM/XL

(refer to ordering code)0.00 to 8 (step 0.01)

Phase reference on doubleearth-faults in resonant-earthed/non-earthed network

Phase preference or no preference(selectable)

Load encroachmentMinimum load resistance 0.10 to 600 Ω(1A) / 0.02 to 120 Ω(5A)

(step 0.001 Ω) or deactivated

Maximum load angle 20 to 60 ° (step 1 °)

Directional decision for all types offaults

With sound phase polarization and/orvoltage memory

Directional sensitivity Dynamically unlimited

TolerancesImpedances(in conformity with DIN 57435,Part 303)

For sinusodial quantities

ΔX

X≤ 5 % for 30 ° ≤ ϕ SC ≤ 90 °

ΔR

R≤ 5 % for 0 ° ≤ ϕ SC ≤ 60 °

ΔZ

Z≤5% for-30°≤(ϕSC -ϕline)≤+30°

Response values (in conformitywith DIN 57435, Part 303)V and IAngle (ϕ)

≤ 5 % of setting value≤ 3 °

Timer tolerance ± 1 % of set value or 10 ms

Operating timesMinimum trip timewith fast relaysMinimum trip timewith high-speed relaysReset time

Approx. 17 ms at 50 HzApprox. 15 ms at 60 HzApprox. 12 ms at 50 HzApprox. 10 ms at 60 HzApprox. 30 ms

1) Secondary data for IN = 1 A; with IN = 5 A the values must be multiplied.

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Technical data

Power swing detection (ANSI 68, 68T)

Power swing detection principle Measurement of the rate of imped-ance vector change and monitoring ofthe vector path

Max. detectable power swing fre-quency

Approx. 7 Hz

Operating modes Power swing blocking and/or powerswing tripping (out-of-step tripping)

Power swing blocking programs All zones blockedZ1/Z1B blockedZ2 to Z5 blockedZ1, Z1B, Z2 blocked

Detection of faults during powerswing blocking

Reset of power swing blocking for alltypes of faults

Tele (pilot) protection for distance protection (ANSI 85-21)

Modes of operation PUTT (Z1B acceleration); DUTTPUTT (acceleration with pickup);POTT; Directional comparison;Reverse interlockingPilot-wire comparison; Unblocking;Blocking

Additional functions Echo function(refer to weak-infeed function)Transient blocking for schemes withmeasuring range extension

Transmission and reception signals Phase-selective signals available formaximum selectivity with single-poletripping; signals for 2 and 3-end-lines

Direct transfer trip (DTT)

Direct phase-selective tripping viabinary input

Alternatively with or withoutauto-reclosure

Trip time delay 0 to 30 s (step 0.01 s) or deactivated

Timer tolerance ± 1 % of setting value or 10 ms

Backup overcurrent protection (ANSI 50N, 51N)

Operating modes Active only with loss of dataconnection and voltage or alwaysactive

Characteristics 3 definite-time stages / 1 inverse-timestage

Definite-time stage (ANSI 50, 50N )

Pickup definite time stage 1,phase current

0.1 to 25 A (1A) / 0.5 to 125 A (5A)

(step 0.01 A) or deactivated

Pickup definite-time stage 1,neutral (residual) current

0.5 to 25 A (1A) / 0.25 to 125 A (5A)


Pickup definite-time stage 2,phase current

0.1 to 25 A (1A) / 0.5 to 125 A (5A)



0.05 to 25 A (1A) / 0.25 to 125 A (5A)


Pickup definite-time stage 3,phase current

0.1 to 25 A (1A) / 0.5 to 125 A (5A)



0.05 to 25 A (1A) / 0.25 to 125 A (5A)


Time delay for definite-time stages 0 to 30 s, (step 0.01 s) or deactivated

TolerancesCurrent pickupDelay timesOperating time

≤ 3 % of set value or 1 % of IN

± 1 % of set value or 10 msApprox. 25 ms

Inverse-time stage (ANSI 51, 51N)

Phase current pickup 0.1 to 4 A (1A) /0.5 to 20 A (5A)


Neutral (residual) current pickup 0.05 to 4 A (1A) /0.25 to 20 A (5A)


Characteristics

Characteristicsaccording to IEC 60255-3

Normal inverseVery inverseExtremely inverseLong time inverse

Time multiplier Tp = 0.05 to 3 s (step 0.01 s)or deactivated

Pickup threshold Approx. 1.1 x I / Ip

Reset threshold Approx. 1.05 x I / Ip

TolerancesOperating time for 2 ≤I/Ip ≤ 20 ≤ 5 % of setpoint ± 15 ms

Characteristicsaccording to ANSI/IEEE

InverseShort inverseLong inverseModerately inverseVery inverseExtremely inverseDefinite inverse

Time dial 0.5 to 15 (step 0.01) or deactivated

Pickup threshold Approx. 1.1 x M

Reset threshold Approx. 1.05 x M

TolerancesOperating time for 2 ≤ M ≤ 20 ≤ 5 % of setpoint ± 15 ms

Instantaneous high-speed switch-onto-fault overcurrent protection(ANSI 50HS)

Operating mode Active only after c.b. closing;instantaneous trip after pickup

Characteristic 2 definite-time stages

Pickup current I >>> 0.1 to 15 A (1A) /0.5 to 75 A (5A)


Pickup current I >>>> 1 to 25 A (1A)/5 to 125 A (5A)


Reset ratio Approx. 0.95

Tolerances < 3 % of set value or 1 % of IN

Directional ground (earth)-fault overcurrent protectionfor high-resistance faults in systems with earthed star point(ANSI 50N, 51N, 67N)

Characteristic 3 definite-time stages / 1 inverse-timestage or 4 definite-time stages or3 definite-time stages / 1 V0invers. stage

Phase selector Permits 1-pole tripping for single-phase faults or 3-pole tripping formulti-phase faults

Inrush restraint Selectable for every stage

Instantaneous trip afterswitch-onto-fault

Selectable for every stage

Influence of harmonicsStages 1 and 2 (I>>> and I>>)

Stages 3 and 4(I> and inverse 4th stage)

3rd and higher harmonics are com-pletely suppressed by digital filtering

2nd and higher harmonics are com-pletely suppressed by digital filtering

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Technical data

Definite-time stage (ANSI 50N)

Pickup value 3I0>>> 0.5 to 25 A (1A) / 2.5 to 125 A (5A)

(step 0.01 A)

Pickup value 3I0>> 0.2 to 25 A (1A) / 1 to 125 A (5A)

(step 0.01 A)

Pickup value 3I0> 0.05 to 25 A (1A) / 0.25 to 125 A (5A)

(step 0.01 A)Neutral (residual) current transformerwith normal sensitivity(refer to ordering data, position 7);0.003 to 25 A (1A) / 0.015 to 125 A (5A)

(step 0.001 A)Neutral (residual) current transformerwith high sensitivity (refer to orderingdata, position 7)

Pickup value 3I0, 4th stage 0.05 to 25 A (1A) / 0.25 to 125 A (5A)

(step 0.01 A)Neutral (residual) current transformerwith normal sensitivity (refer to order-ing data, position 7);0.003 to 25 A (1A) / 0.015 to 125 A (5A)


Time delay for definite-time stages 0 to 30 s (step 0.01 s) or deactivated

TolerancesCurrent pickupDelay times

≤ 3 % of setting value or 1 % IN

1 % of setting value or 10 ms

Command / pickup times 3I0>>>and 3I0>>

Approx. 30 ms

Command / pickup times 3I0> and3I0, 4th stage

Approx. 40 ms

Inverse-time stage (ANSI 51N)

Ground (earth)-current pickup 3I0P 0.05 to 4 A (1A) / 0.25 to 20 A (5A)

(step 0.01 A)Neutral (residual) current transformerwith normal sensitivity(refer to ordering data, position 7)0.003 to 4 A (1A) / 0.015 to 20 A (5A)


Tripping characteristics acc. toIEC 60255-3

Normal inverse; very inverse;extremely inverse; long inverse

ANSI/IEEE tripping characteristic(not for region DE, refer to orderingdata, position 10)

Inverse; short inverse; long inverse;moderately inverse; very inverse;extremely inverse; definite inverse

Inverse logarithmic tripping charac-teristics (not for regions DE and US,refer to ordering data, position 10)

Pickup threshold

t T T= − ⋅3 0 3 0

3 0

3 0I I

I

IPmax P

p

ln

1.1 to 4.0 x I/Ip (step 0.1 s)

Time multiplier for IEC T character-istics

Tp = 0.05 to 3 s (step 0.01 s)

Time multiplier for ANSI D charac-teristics

DI0P = 0.5 to 15 s (step 0.01 s)

Pickup threshold Approx. 1.1 x I/Ip (ANSI: I/Ip = M)

Inverse logarithmic pickup threshold 1.1 to 4.0 x I/I0P (step 0.1)

Reset threshold Approx. 1.05 x I/I0P (ANSI: I/Ip = M)

ToleranceOperating time for 2 ≤ I/Ip ≤ 20 ≤ 5 % of setpoint ± 15 ms

Zero-sequence voltage protection V0inverse

Tripping characteristic tV

V

=−

2

0

4

s

0inv min

Direction decision (ANSI 67N)

Measured signals for direction deci-sion

3I0 and 3V0 or3I0 and 3V0 and IY (star point currentof an earthed power transformer) or3I2 and 3V2 (negative-sequencesystem) or zero-sequence power Sr orautomatic selection of zero-sequenceor negative-sequence quantities de-pendent on the magnitude of the com-ponent voltages

Min. zero-sequence voltage 3V0 0.5 to 10 V (step 0.1 V)

Min. current IY (of grounded(earthed) transformers)

0.05 to 1 A (1A) / 0.25 to 5 A (5A)

(step 0.01 A)

Min. negative-sequence voltage 3V2 0.5 to 10 V (step 0.1 V)

Min. negative-sequence current 3I2 0.05 to 1 A (1A) / 0.25 to 5 A (5A)

(step 0.01 A)

Inrush current blocking, capable of being activated for each stage

Component of the 2nd harmonic 10 to 45 % of the fundamental(step 1 %)

Max. current, which cancels inrushcurrent blocking

0.5 to 25 A (1A) / 2.5 to 125 A (5A)

(step 0.01 A)

Tele (pilot) protection for directional ground(earth)-fault overcurrentprotection (ANSI 85-67N)

Operating modes Directional comparison: PickupDirectional comparison: BlockingDirectional comparison: Unblocking

Additional functions Echo (see function "weak infeed");transient blocking for schemes withparallel lines

Transmission and reception signals Phase-selective signals available formaximum selectivity with single-poletripping; signals for 2 and 3-end-lines

Weak-infeed protection with undervoltage (ANSI 27WI)

Operating modes with carrier(signal) reception

EchoEcho and trip with undervoltage

Undervoltage phase – ground(earth)

2 to 70 V (step 1 V)

Time delay 0.00 to 30 s (step 0.01 s)

Echo impulse 0.00 to 30 s (step 0.01 s)

TolerancesVoltage thresholdTimer

≤ 5 % of set value or 0.5 V± 1 % of set value or 10 ms

Fault locator

Output of the distance to fault X, R (secondary) in ΩX, R (primary) in ΩDistance in kilometers or in % of linelength

Start of calculation With trip, with reset of pickup, withbinary input

Reactance per unit length 0.005 to 6.5 Ω/km(1A) / 0.001 to1.3 Ω/km(5A)

(step 0.0001 Ω/km)

Tolerance For sinusoidal quantities≤ 2.5 % line length for30 ° ≤ ϕSC ≤ 90 ° and VSC/Vnom > 0.1

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Technical data

Voltage protection (ANSI 59, 27)

Operating modes Local tripping or only indication

Overvoltage protection

Pickup values VPH-Gnd>>, VPH-Gnd>(phase-ground (earth) overvoltage)

1 to 170 V (step 0.1 V)or deactivated

Pickup values VPH-PH>>, VPH-PH>(phase-phase overvoltage)


Pickup values 3V0>>, 3V0>(3V0 can be measured via V4 trans-formers or calculated by the relay)(zero-sequence overvoltage)


Pickup values V1>>, V1>(positive-sequence overvoltage)


Measured voltage Local positive-sequencevoltage or calculatedremote positive-sequencevoltage (compounding)

Pickup values V2>>, V2>(negative-sequence overvoltage)


Reset ratio (settable) 0.5 to 0.98 (step 0.01)

Undervoltage protection

Pickup values VPH-Gnd<<, VPH-Gnd<(phase-ground (earth) undervoltage)


Pickup values VPH-PH<<, VPH-PH<(phase-phase undervoltage)


Pickup values V1<<, V1<(positive-sequence undervoltage)


Blocking of undervoltage protectionstages

Minimum current; binary input

Reset ratio 1.05

Time delays

Time delay for all over- andundervoltage stages

0 to 100 s (steps 0.01 s) or deactivated

Command / pickup time Approx. 30 ms

TolerancesVoltage limit valuesTime stages

≤ 3 % of setting value or 0.5 V1 % of setting value or 10 ms

Frequency protection (ANSI 81)

Number of frequency elements 4

Setting range 45.5 to 54.5 Hz(in steps of 0.01) at fnom = 50 Hz55.5 to 64.5 Hz(in steps of 0.01) at fnom = 60 Hz

Delay times 0 to 600 s or ∞ (in steps of 0.01 s)

Operating voltage range 6 to 230 V (phase-to-ground (earth))

Pickup times Approx. 80 ms

Dropout timesHysteresisDropout condition

Approx. 80 msApprox. 20 mHzVoltage = 0 V and current = 0 A

TolerancesFrequencyDelay times

12 m Hz for V = 29 to 230 V1 % of the setting value or 10 ms

Breaker failure protection (ANSI 50BF)

Number of stages 2

Pickup of current element 0.05 to 20 A(1A) / 0.25 to 100 A(5A)

(step 0.01 A)

Time delays T11phase, T13phase, T2 0 to 30 s (steps 0.01 s) or deactivated

Additional functions End-fault protectionCB pole discrepancy monitoring

Reset time Approx. 15 ms, typical; 25 ms max.

TolerancesCurrent limit valueTime stages

≤ 5 % of setting value or 1 % Inom

1 % of setting value or 10 ms

Auto-reclosure (ANSI 79)

Number of auto-reclosures Up to 8

Operating mode Only 1-pole; only 3-pole, 1 or 3-pole

Operating modes with line voltagecheck

DLC – dead-line checkADT – adaptive dead timeRDT – reduced dead time

Dead times T1-ph, T3-ph, TSeq 0 to 1800 s (step 0.01 s) or deactivated

Action times 0.01 to 300 s (step 0.01 s) or deactivated

Reclaim times 0.5 to 300 s (step 0.01 s)

Start-signal monitoring time 0.01 to 300 s (step 0.01 s)

Additional functions Synchro-check request3-phase intertrippingInterCLOSE commandto the remote endCheck of CB ready stateBlocking with manual CLOSE

Voltage limit values for DLC, ADT,RDT

Healthy line voltageDead line

30 to 90 V (step 1 V)2 to 70 V (step 1 V)

TolerancesTime stagesVoltage limit values

1 % of setting value or 10 ms≤ 3 % of setting value or 0.5 V

Synchro-check (ANSI 25)

Initiate options Auto-reclosure;Manual CLOSE controlControl commands

Operating modeswith auto-reclosure

For manual closureand control commands

Synchro-checkLine dead/busbar liveLine live/busbar deadLine and busbar deadBypassing

As for auto-reclosure

Permissible voltage difference 1 to 60 V (step 0.1 V)

Permissible frequency difference 0.03 to 2 Hz (step 0.01 Hz)

Permissible angle difference 2 to 80 ° (step 1 °)

Max. duration of synchronization 0.01 to 600 s (step 0.01 s) or deactivated

Release delay with synchronousnetworks

0 to 30 s (step 0.01 s)

TolerancesTime stagesVoltage limit values

1 % of setting value or 10 ms≤ 2 % of setting value or 2 V

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Technical data

Thermal overload protection (ANSI 49)

Setting rangesFactor k acc. to IEC 60255-8Time constant τ

1 to 4 (steps 0.01)1 to 999.9 min (steps 0.1 min)

Temperature alarm stage Θalarm/Θtrip 50 to 100 % in relation to the triptemperature

Current alarm stage Ialarm

Secondary 1 ASecondary 5 A

0.1 to 4 A (step 0.1)0.5 to 20 A (step 0.1)

Trip time characteristic( )

tk I

=−

− ⋅τ ln

I I

I 2

2 2pre

N

2

Reset ratiosΘ / Θalarm

Θ / Θtrip

I / Ialarm

Approx. 0.99Approx. 0.99Approx. 0.99

Tolerances Class 10 % acc. to IEC

Trip circuit supervision (ANSI 74TC)

Number of supervisable trip circuits Up to 3

Number of required binary inputsper trip circuit

1 or 2

Indication relay 1 to 30 s (step 1 s)

Additional functions

Operational measured values

Representation Primary, secondary and percentagereferred to rated value

Currents 3 x IPhase; 3I0; IGnd sensitve; I1; I2; IY;3I0PAR

3 x IDiff, 3 x IStab

Tolerances ≤ 0.5 % of indicated measured valueor 0.5 % Inom

Voltages 3 x VPhase-Ground; 3 x VPhase-Phase; 3V0,V1, V2, VSYNC, Ven , VCOMP

Tolerances ≤ 0.5 % of indicated measured valueor 0.5 % Vnom

Power with direction indication P, Q, S

TolerancesP: for ⏐cos ϕ⏐ = 0.7 to 1 andV/Vnom, I/Inom = 50 to 120 %Q: for ⏐sin ϕ⏐ = 0.7 to 1 andV/Vnom , I/Inom = 50 to 120 %S: for V/Vnom, I/Inom = 50 to120 %

Typical ≤ 1 %

Typical ≤ 1 %

Typical ≤ 1 %

FrequencyTolerance

f≤ 20 mHz

Power factor

Tolerance for ⏐cos ϕ⏐ = 0.7 to 1

PF (cos ϕ)

Typical ≤ 3 %

Load impedances with directionalindication

3 x RPhase-Ground, XPhase-Ground

3 x RPhase-Phase, XPhase-Phase

Overload measured values Θ/ΘTrip L1; Θ/ΘTrip L2; Θ/ΘTrip L3;Θ/ΘTrip

Long-term mean values

Interval for derivation of mean value 15 min / 1 min; 15 min / 3 min;15 min / 15 min

Synchronization instant Every ¼ hour; every ½ hour; everyhour

Values 3 x IPhase; I1; P; P+; P-; Q; Q+; Q–; S

Restricted earth-fault protection (ANSI 87N)

Multiple availability 2 times (option)

Settings

Differential current IREF >/INobj

Limit angle ϕ REF

Time delay TREF

The set times are pure delay times

0.05 to 2.00 (steps 0.01)

110 ° (fixed)

0.00 to 60.00 s (steps 0.01 s)or deactivated (no trip)

Operating times

Pickup time (in ms) at frequency

At 1.5 · setting value IREF >, approx.At 2.5 · setting value IREF >, approx.

Dropout time (in ms), approx.

Dropout ratio, approx.

50 Hz 60 Hz

30 2528 24

26 23

0.7

Overcurrent-time protection for phase and residual currents

Multiple availability 3 times (option)

Characteristics

Definite-time stages (DT)

Inverse-time stages (IT)Acc. to IEC

Acc. to ANSI

Reset characteristics (IT)

IPh >>, 3I0 >>, IPh >, 3I0 >

IP, 3I0P

Inverse, very inverse, extremelyinverse, long-time inverse

Inverse, moderately inverse, veryinverse, extremely inverse, definiteinverse, short inverse, long inverse

Alternatively, user-specifiedtrip and reset characteristics

Acc. to ANSI with disk emulation

Current stages

High-current stages IPh >>

TIPh >>

3I0 >>

T3I0 >>

Definite-time stages IPh >

TIPh

3I0 >

T3I0 >

Inverse-time stages IP

Acc. to IEC TIP

3I0P

T3I0P

Inverse-time stages IP

Acc. to ANSI DIP

3I0P

D3I0P

0.10 to 35.00 A 1) (steps 0.01 A)or deactivated (stage ineffective)








0.10 to 4.00 A 1) (steps 0.01 A)


0.05 to 4.00 A 1) (steps 0.01 A)


0.10 to 4.00 A 1) (steps 0.01 A)


0.05 to 4.00 A 1) (steps 0.01 A)


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Technical data

CE conformity

This product is in conformity with the Directives of the European Commu-nities on the harmonization of the laws of the Member States relating toelectromagnetic compatibility (EMC Council Directive 89/336/EEC) andelectrical equipment designed for use within certain voltage limits (CouncilDirective 73/23/EEC).

This unit conforms to the international standard IEC 60255, and the Ger-man standard DIN 57435/Part 303 (corresponding to VDE 0435/Part 303).

Further applicable standards: ANSI/IEEE C37.90.0 and C37.90.1.

The unit has been developed and manufactured for application in an indus-trial environment according to the EMC standards.

This conformity is the result of a test that was performed by Siemens AG inaccordance with Article 10 of the Council Directive complying with thegeneric standards EN 50081-2 and EN 50082-2 for the EMC Directive andstandard EN 60255-6 for the “low-voltage Directive”.

Further additional functions

Measurement supervision Current sumCurrent symmetryVoltage sumVoltage symmetryVoltage phase sequenceFuse failure monitor

AnnunciationsEvent loggingFault logging

Buffer size 200Storage of signals of the last 8 faults,buffer size 800

Switching statistics Number of breaking operations perc.b. poleSum of breaking current per phaseBreaking current of last trip operationMax. breaking current per phase

Circuit-breaker test TRIP/CLOSE cycle 3-phaseTRIP/CLOSE cycle per phase

Setting rangeDead time for CB TRIP/CLOSEcycle

0.00 to 30 s (step 0.01 s)0.00 to 30 s (step 0.01 s)

Commissioning support Operational measured valuesCircuit-breaker testRead binary testInitiate binary inputsSet binary outputsSet serial interface outputsLockout of a deviceTest mode ot the differentialprotection topology

Minimum/maximum memory

Indication Measured values with date and time

Resetting CyclicallyVia binary inputVia the keyboardVia serial interface

ValuesMin./max. of measured values

Min./max. of mean values

3 x IPhase; I1; 3 x VPhase-Ground; 3 xVPhase-to-phase; 3V0; V1;P+; P–; Q+; Q–; S; f; power factor(+); power factor (–)3 x IPhase; I1; P; Q; S

Energy meters

Four-quadrant meters WP+; WP–; WQ+; WQ–

Tolerancefor ⏐cos ϕ⏐ > 0.7 and V > 50 %Vnom and I> 50 % Inom

5 %

Oscillographic fault recording

Analog channels 3 x IPhase, 3I0, 3I0PAR, 3I0 Gnd sensitive,3 x IDiff, 3 x IStab

3 x VPhase, 3V0, VSYNC, Ven, Vx

Max. number of available recordings 8, backed-up by battery if auxiliaryvoltage supply fails

Sampling intervals 20 samplings per cycle

Total storage time Approx. 15 s

Binary channels Pickup and trip information; numberand contents can be freely configuredby the user

Max. number of displayed binarychannels

40

Control

Number of switching units Depends on the number of binary /indication inputs and indication /command outputs

Control commands Single command / double command1, 1 plus 1 common or 2 pole

Feed back CLOSE, TRIP, intermediate position

Interlocking Freely configurable

Local control Control via menu, function keys

Remote control Control protection, DIGSI, pilotwires

Siemens SIP · 2008


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Selection and ordering data Description Order No. Ordercode

7SD5 multi-end differential protection relay 7SD5��-��-�� for two to six line ends

Operator panel options4-line backlit display 2Backlit graphic display, key-operated switch 3

Relay typeMulti-end differential prot. relay for two line end operation1) 2Multi-end differential prot. relay for multi-line end op. (2 to 6) 3

Measurement inputIPH = 1 A2), IGnd = 1 A (min. = 0.05 A) 1IPH = 1 A2), IGnd = high sensitive (min. = 0.003 A) 2IPH = 5 A2), IGnd = 5 A (min. = 0.25 A) 5IPH = 5 A2), IGnd = high sensitive (min. = 0.003 A) 6

Rated auxiliary voltage (power supply, binary indication voltage)24 to 48 V DC, binary input threshold 17 V4) 260 to 125 V DC3), binary input threshold 17 V4) 4110 to 250 V DC3), 115 V AC, binary input threshold 73 V4) 5220 to 250 V DC3), 115 V AC, binary input threshold 154 V4) 6

Unit design / number of inputs and outputs1/2 x 19”, 8 BI, 16 BO, for flush mounting, with screw-type terminals A1/1 x 19”, 16 BI, 24 BO, for flush mounting, with screw-type terminals C1/1 x 19”, 24 BI, 32 BO, for flush mounting, with screw-type terminals D1/2 x 19”, 8 BI, 16 BO, for surface mounting, with screw-type terminals E1/1 x 19”, 16 BI, 24 BO, for surface mounting, with screw-type terminals G1/1 x 19”, 24 BI, 32 BO, for surface mounting , with screw-type terminals H1/2 x 19”, 8 BI, 16 BO, for flush mounting, with plug-in terminals J1/1 x 19”, 16 BI, 24 BO, for flush mounting, with plug-in terminals L1/1 x 19”, 24 BI, 32 BO, for flush mounting, with plug-in terminals MWith 5 high-speed trip contacts, approx. 1 ms closing time1/1 x 19”, 16 BI, 24 BO, for flush mounting, with screw-type terminals NWith 5 high-speed trip contacts, approx. 1 ms1/1 x 19”, 24 BI, 32 BO, for flush mounting, with screw-type terminals PWith 5 high-speed trip contacts, approx. 1 ms1/1 x 19”, 16 BI, 24 BO, for surface mounting, with two-tier terminals QWith 5 high-speed trip contacts, approx. 1 ms1/1 x 19”, 24 BI, 32 BO, for surface mounting, with two-tier terminals RWith 5 high-speed trip contacts, approx. 1 ms1/1 x 19”, 16 BI, 24 BO, for flush mounting, with plug-in terminals SWith 5 high-speed trip contacts, approx. 1 ms1/1 x 19”, 24 BI, 32 BO, for flush mounting, with plug-in terminals T

Region and operating languageRegion DE, language German (selectable) ARegion World, language English (GB) (selectable) BRegion US, language English (US) (selectable) CRegion FR, language French (selectable) DRegion World, language Spanish (selectable) E

Regulation on region-specific presettings and function versions:Region DE: preset to f = 50 Hz and line length in km, only IEC,

directional ground-(earth) fault protection: no logarithmic inverse characteristic,no direction decision with zero-sequence power Sr

Region US: preset to f = 60 Hz and line length in miles, ANSI inverse characteristic only,directional ground-(earth) fault protection: no logarithmic inverse characteristic,no direction decision with zero-sequence power Sr, no U0 inverse characteristic

Region World: preset to f = 50 Hz and line length in km, directional ground-(earth) fault protection:no direction decision with zero-sequence Sr, no U0 inverse characteristic

Region FR: preset to f = 50 Hz and line length in km, directional ground-(earth) fault protection:no U0 inverse characteristic, no logarithmic inverse characteristic, weak infeed logicselectable between French specification and World specification

1) Hot standby with two protectiondata interfaces possible.

2) Rated current can be selected bymeans of jumpers.

3) Transition between the two auxiliaryvoltage ranges can be selected bymeans of jumpers.

4) The binary input thresholds can beselected in two stages by means ofjumpers.

see nextpage

��

Operator panel with:– function keys,– numerical keys,– PC interface– display (pos. 5)– key-operated

switches (pos. 5)

Siemens SIP · 2008


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System interface: functionality and hardwareNo system interface 0IEC 60870-5-103 protocol, electrical RS232 1IEC 60870-5-103 protocol, electrical RS485 2IEC 60870-5-103 protocol, 820 nm optical, ST connector 3PROFIBUS-FMS Slave, electrical RS4851) 4PROFIBUS-FMS Slave, 820 nm optical, double ring, ST connector1)2) 6PROFIBUS-DP Slave, RS485 9 L 0 APROFIBUS-DP Slave, 820 nm optical, double ring, ST connector2) 9 L 0 BDNP 3.0, RS485 9 L 0 GDNP 3.0, 820 nm optical, ST connector2) 9 L 0 HIEC 61850, 100 Mbit Ethernet, electrical, double, RJ45 connector (EN 100) 9 L 0 RIEC 61850, 100 Mbit Ethernet, optical, double, ST connector (EN 100)4) 9 L 0 S

DIGSI/modem interface (on rear side of unit) and protection interface 9 M��

No DIGSI interface on rear of unit 0DIGSI 4, electrical RS232 1DIGSI 4, electrical RS485 2DIGSI 4, fiber-optical 820 nm, ST connector 3

Protection data interface 1 (R2R interface)FO5: Optical 820 nm, two ST connectors, FO cable length up to 1.5 kmfor direct connection or via communication networks AFO6: Optical 820 nm, two ST connectors, FO cable length up to 3.5 kmfor direct connection via multi-mode FO cable BFO17: Optical 1300 nm, LC-Duplex connectors, FO cable length up to 24 km3)

for direct connection via mono-mode FO cable GFO18: Optical 1300 nm, LC-Duplex connectors, FO cable length up to 60 km3)5)

for direct connection via mono-mode FO cable HFO19: Optical 1550 nm, LC-Duplex connectors, FO cable length up to 100 km3)6)

for direct connection via mono-mode FO cable J

1) For SICAM energy automationsystem.

2) Optical double ring interfaces are notavailable with surface-mounting hous-ings. Please, order the version withRS485 interface and a separate electri-cal/optional converter.

3) For surface-mounting housing appli-cations, please select option A(820 nm, 1.5 km) together with anexternal repeater (for Order No.,see Accessories).

4) If position 9 = "E, G, H, Q, R" (surface-mounting housing), please order relaywith electrical Ethernet interface.

see nextpage

��

5) For distances less than 25 km, two opticalattenuators 7XV5107-0AA00 are requiredto avoid optical saturation of the receiverelement.

6) For distances less than 50 km, two opticalattenuators 7XV5107-0AA00 are requiredto avoid optical saturation of the receiverelement.

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Functions 1Trip mode Auto-reclosure Synchro-

(ANSI 79) check (ANSI 25)

3-pole 03-pole � 11/3-pole 21/3-pole � 33-pole � 43-pole � � 51/3-pole � 61/3-pole � � 7

Functions 1 with protection interface 2 9 N ��

Functions 1Trip mode Auto-reclosure Synchro-

(ANSI 79) check (ANSI 25)

3-pole 03-pole � 11/3-pole 21/3-pole � 33-pole � 43-pole � � 51/3-pole � 61/3-pole � � 7

Protection data interface 2 (R2R interface)Optical 820 nm, two ST connectors, FO cable length up to 1.5 kmfor direct connection or via communication networks AOptical 820 nm, two ST connectors, FO cable length up to 3.5 kmfor direct connection via multi-mode FO cable BOptical 1300 nm, LC-Duplex connectors, FO cable length up to 24 km1)

for direct connection via mono-mode FO cable GOptical 1300 nm, LC-Duplex connectors, FO cable length up to 60 km1)2)

for direct connection via mono-mode FO cable HOptical 1550 nm, LC-Duplex connectors, FO cable length up to 100 km1)3)

for direct connection via mono-mode FO cable J

1) For surface-mounting applications,please select option A (820 nm, 1.5 km)together with an external repeater(for Order No., see Accessories).

2) For distances less than 25 km, twooptical attenuators 7XV5107-0AA00are required to avoid optical saturationof the receiver element.

3) For distances less than 50 km, twooptical attenuators 7XV5107-0AA00are required to avoid optical saturationof the receiver element.

see nextpage

��

Siemens SIP · 2008


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Description Order No. Ordercode


Ove

rcurr

ent tim

e prot

ectio

n

(AN

SI50

, 50N

, 51,

51N

)

Break

erfa

ilure

prot

ectio

n

(AN

SI50

BF)D

irect

ional

earth

-fault

prot

ectio

n, ear

thed

networ

ks

(AN

SI50

N, 5

1N, 6

7N)

Dist

ance

prot

ectio

nwith

quad

rilat

eral

and

mho

char

acte

ristic

(AN

SI21

, 21N

)

Dist

ance

prot

ectio

nwith

spec

ial p

ickup

met

hods

(I>, V

/I,V/I/

ϕ, Z<)

(AN

SI21

, 21N

)

Parall

ellin

e com

pensa

tion

Power

swin

g dete

ctio

n

(AN

SI68

, 68T

)

� � C� � � � � D� � � � � E� � � F� � � � � � G� � � � � � H

4re

mot

e com

man

ds

24re

mot

e indi

catio

ns

Transfo

rmer

exte

nsion

with

vect

orgr

oup

adap

tion

(AN

SI87

T)Fa

ultlo

cato

r withm

easu

rem

ent

atbo

thlin

e ends

Fault

loca

tor with

mea

sure

men

t

at1

line en

dO

ver/u

nderv

olta

gepr

otec

tion

V>, V<

(AN

SI27

,59)

Ove

r/unde

rfreq

uency

prot

ectio

n

(AN

SI81

)Res

trict

edea

rth-fa

ult

prot

ectio

n(A

NSI

87N

)� � J� � � K� � � L� � � � M� � � N� � � � P� � � � Q� � � � � R� � � � S� � � � � T� � � � � U� � � � � � V

Additional functions 1

Mea

sure

dva

lues

exte

nded

Min

, max

, mea

nExt

ernal

GPS

synch

ro.

ofdi

ffere

ntial p

rote

ctio

n

Capac

itive

char

gecu

rren

t

com

pensa

tion

0� 1

� 2� � 3

� 4� � 5

� � 6� � � 7

Additional functions 2

Functions

Selection and ordering data

Siemens SIP · 2008


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Accessories Description Order No.

Opto-electric communication converter CC-XG (connection to communication network)Converter to interface to X21 or RS422 or G703-64 kbit/s synchronouscommunication interfacesConnection via FO cable for 62.5 / 125 μm or 50 / 120 μm and 820 nmwavelength (multi-mode FO cable) with ST connector, max. distance 1.5 kmElectrical connection via X21/RS422 or G703-64 kbit/s interface 7XV5662-0AA00

Opto-electric communication converter CC-2M to G703-E1/-T1 communication networkswith 2,048/1,554 kbit/sConverter to interface between optical 820 nm interface and G703-E1/-T1 interfaceof a communication networkConnection via FO cable for 62.5/125 µm or 50/120 µm and820 nm wavelength (multi-mode FO cable) with ST connector, max. distance 1.5 kmElectrical connection via G703-E1/-T1 interface 7XV5662-0AD00

Opto-electric communication converter (connection to pilot wire)Converter to interface to a pilot wire or twisted telephone pair (typical 15 km length)Connection via FO cable for 62.5/125 μm or 50/120 μm and 820 nmwavelength (multi-mode FO cable) with ST connector;max. distance 1.5 km, screw-type terminals to pilot wire 7XV5662-0AC00

Additional interface modulesProtection data interface mod. opt. 820 nm, multi-mode FO cable, ST connector, 1.5 km C53207-A351-D651-1Protection data interface mod. opt. 820 nm, multi-mode FO cable, ST connector, 3.5 km C53207-A351-D652-1

Further modulesProtection data interface mod. opt. 1300 nm, mono-mode FO cable,LC-Duplex connector, 24 km C53207-A351-D655-1Protection data interface mod. opt. 1300 nm, mono-mode FO cable,LC-Duplex connector, 60 km C53207-A351-D656-1Protection data interface mod. opt. 1550 nm, mono-mode FO cable,LC-Duplex connector, 100 km C53207-A351-D657-1

Optical repeatersSerial repeater (2-channel), opt. 1300 nm, mono-mode FO cable,LC-Duplex connector, 24 km 7XV5461-0BG00Serial repeater (2-channel), opt. 1300 nm, mono-mode FO cable,LC-Duplex connector, 60 km 7XV5461-0BH00Serial repeater (2-channel), opt. 1550 nm, mono-mode FO cable,LC-Duplex connector, 100 km 7XV5461-0BJ00

Time synchronizing unit with GPS outputGPS 1 sec pulse and time telegram IRIG B/DCF 77 7XV5664-0AA00

Isolation transformer (20 kV) for pilot wire communication 7XR9516

Voltage transformer miniature circuit-breakerRated current 1.6 A; thermal overload release 1.6 A; overcurrent trip 6 A 3RV1611-1AG14

Siemens SIP · 2008


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Accessories

Fig. 7/76 Mounting rail for 19" rack

Fig. 7/772-pin connector

Fig. 7/783-pin connector

Fig. 7/79Short-circuit linkfor currentcontacts

Fig. 7/80Short-circuit linkfor voltagecontacts/indicationscontacts

LSP

2089

-afp

en.ti

fLS

P20

91-a

fpen

.eps

LSP

2090

-afp

en.e

psLS

P20

93-a

fpen

.eps

LSP

2092

-afp

en.e

ps

Description Order No. Size ofpackage

Supplier Fig.

Connector 2-pin3-pin

C73334-A1-C35-1C73334-A1-C36-1

11

SiemensSiemens

7/777/78

Crimp CI2 0.5 to 1 mm2

connector0-827039-10-827396-1

40001

AMP 1)

AMP 1)

CI2 1 to 2.5 mm20-827040-10-827397-1

40001

AMP 1)

AMP 1)

Type III+ 0.75 to 1.5 mm20-163083-70-163084-2

40001

AMP 1)

AMP 1)

Crimping For Type III+tool and matching female

For CI2and matching female

0-539635-10-539668-20-734372-11-734387-1

1

1

AMP 1)

AMP 1)

AMP 1)

AMP 1)

19"-mounting rail C73165-A63-D200-1 1 Siemens 7/76

Short-circuit links For current terminalsFor other terminals

C73334-A1-C33-1C73334-A1-C34-1

11

SiemensSiemens

7/797/80

Safety cover for terminals largesmall

C73334-A1-C31-1C73334-A1-C32-1

11

SiemensSiemens

Description Order No.

DIGSI 4Software for configuration and operation of Siemens protection unitsrunning under MS Windows (Windows 2000 or XP Professional)device templates, Comtrade Viewer, electronic manual includedas well as “Getting started” manual on paper, connecting cables (copper)

BasisFull version with license for 10 computers, on CD-ROM(authorization by serial number) 7XS5400-0AA00

ProfessionalDIGSI 4 Basis and additionally SIGRA (fault record analysis),CFC Editor (logic editor), Display Editor (editor for defaultand control displays) and DIGSI 4 Remote (remote operation) 7XS5402-0AA00

SIGRA 4(generally contained in DIGSI Professional, but can be ordered additionally)Software for graphic visualization, analysis and evaluation of fault records.Can also be used for fault records of devices of other manufacturers(Comtrade format). Running under MS Windows (Windows 2000 or XP Professional).Incl. templates, electronic manual with license for 10 PCs.Authorization by serial number. On CD-ROM. 7XS5410-0AA00

Connecting cableCable between PC/notebook (9-pin connector)and protection unit (9-pin connector)(contained in DIGSI 4, but can be ordered additionally) 7XV5100-4

Manual for 7SD522/523 V4.6English C53000-G1176-C169

1) Your local Siemens representativecan inform you on local suppliers.

Siemens SIP · 2008


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Connection diagram

Fig. 7/81 Basic version in housing 1/2 x 19” with 8 binary inputsand 16 binary outputs

Fig. 7/82 Serial interfaces

Fig. 7/83

Additional setting by jumpers:

Separation of common circuit ofBO8 to BO12 with jumpers X80, X81,X82. Switching of BO14, BO15 as NOcontact or NC contact with jumpersX41, X42, X43.

1) Configuration of binary outputsuntil Hardware-version /EE.For advanced flexibility seeFig. 7/83.

BO8

BO9

BO10

BO11

BO12

BO13

BO14

BO15

Siemens SIP · 2008


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7/79

Connection diagram

Fig. 7/84 Medium version in housing 1/1 x 19”*) For unit version 7SD52xx-xN/S/Q

high-speed contacts

Fig. 7/85




BO8

BO9

BO10

BO11

BO12

BO13

BO14

BO15

Siemens SIP · 2008


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7/80

Connection diagram

Fig. 7/86 Maximum version in housing 1/1 x 19”*) For unit version 7SD52xx-xR/P/T

high-speed contacts

Fig. 7/87




BO8

BO9

BO10

BO11

BO12

BO13

BO14

BO15

Siemens SIP · 2008


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7/81

Dimension drawings in mm / inch

Dimension drawings for SIPROTEC 41/2 x 19" flush-mounting housings (7XP20)

Side view 1 Side view 2 Panel cutout

Rear view 17SA61/63, 7UM621, 7UM623,7SJ64

Rear view 27SJ63, 7UM612, 6MD63

Rear view 37SA522, 7SD52/53

Fig. 17/26

1/2 x 19" flush-mounting housing

Rear view 47UT613

Siemens SIP · 2008


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7/82


Dimension drawings for SIPROTEC 41/1 x 19" flush-mounting housings (7XP20)

Side view 1 Side view 2

Panel cutout Rear view 17SA6, 7UM622, 7SJ64, 7UT633, 7UT635

Rear view 37SA522, 7SD52/53

Rear view 27SJ63, 6MD63

Fig. 17/28

in 1/1 x 19" flush-mounting housing

* Terminals M and L additionally for 7UT635 and 7SJ647 only

** Terminals H and G not for 7SJ645 and 7SJ647

Siemens SIP · 2008


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Front view1/1 x 19" surface-mounting housing 7XP20(without sloped FO case)

Front view1/2 x 19" surface-mounting,terminals at top and bottomhousing 7XP20

Side view

Dimension drawings for SIPROTEC 41/2 and 1/1 x 19" surface-mounting housings(7XP20)

Fig. 17/29

1/2 and 1/1 x 19" surface-mounting housing

siprotec 4 7sd52/53 multi-end differential and distance ..._control_and... · • differential...

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